* menu_items: fix the real-bug-tier compiler warnings (#691 batch 1)

Six fixes, all in menu_items.c, all verified by menu playtest on macOS:

- BSWAP16(*color0++) advanced the pointer twice per pixel on little-endian
  builds (the macro evaluates its argument twice) and mixed bytes from two
  different pixels. Read first, increment separately. Note: this function
  (func_8009A9FC) currently has no callers, so the corruption was latent,
  not live.
- func_8009B9D0 fell off the end on a lookup miss, returning garbage (the
  existing code comment already suspected this). The miss path now returns
  the display list head unchanged, i.e. draws nothing.
- update_ok_menu_item read an uninitialized stack slot for unknown menu
  item types; now selects an explicit no-animation value, matching what
  the garbage read did in practice.
- pause_menu_item_box_cursor: removed the three empty 'if (x2);' matching
  artifacts. The x/y/z spin state itself is untouched.
- func_800A1FB0: initialized var_s4/var_s5 against the guarded-but-warned
  switch default.
- func_800A54EC: initialized the pause cursor position pointer against its
  unreachable mode-switch default (would have been a null-deref class bug
  if mode values ever grew).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* collision: define the G_ENDDL opcode shifts, return 0 when no tyre surface found

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* replays: cast staff-ghost pointer comparisons, return 0 for empty ghost buffer

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* update_objects: return 0 from conditional step helpers, fix TLUT pointer comparison, init train draw distances

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* render_player: remove the impossible lamp range (vanilla bug, never glowed on N64 either)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* math_util_2: return the vector, not the address of the parameter slot

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Crab: remove inner declaration shadowing the initialized objectIndex

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* editor: honor InverseMatrix failure (bool was compared against 2, always true)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Track.h: drop dead null checks on array members

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* shells: drop always-true angle and surface gates (behavior unchanged, s16 made them tautological)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* particles: make the no-return particle setters void

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* effects/stubs/skybox/main: align signatures with functions that return nothing

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* menus/save: type the pak status variable as s32, return BAD_READ on the fall-off path

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* audio: remove uninitialized-read matching artifacts, init isSound

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* code_80005FD0/code_80086E70: init dead bomb kart pointer and the no_init variable

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* port/engine UI: fix printf-style format types and non-literal format string

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* render_objects: feed the unused texture param to the uninitialized img walker

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Format the changed lines per .clang-format

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Address review: strip explanatory comments, drop vec3f pointer returns

Comments moved to the PR record; the one flagged worth keeping stays.
vec3f_set_xyz/normalize/cross_product return void now since the out
argument is the interface and nothing used the pointer.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Update actors_extended.c

* Add checkbox for 'Shells Shoot Straight' option

* Update render_player.c

* Update PortMenu.cpp

* Update render_player.c

* Update actors_extended.c

* Update render_player.c

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: MegaMech <MegaMech@users.noreply.github.com>

* Rename Screen Contexts

* typedef ScreenContext struct

* Fix Compile

* Rename Course.cpp to Track.cpp

* Refactor Course to Track

* A few renames

* General Cleanup

* More Rename

* More names

* Move TrackSections struct to Track.h

---------

Co-authored-by: MegaMech <7255464+MegaMech@users.noreply.github.com>

* try add a better save

use https://github.com/sonicdcer/N64ModernRuntime/blob/controllerpakimpl/librecomp/src/pak.cpp as a ref

Co-Authored-By: Alejandro Asenjo Nitti <96613413+sonicdcer@users.noreply.github.com>

* update pak

* Update save.c

* Better controller pak with File deletion menu

Co-authored-by: Dario <dariosamo@gmail.com>
Co-authored-by: Mr-Wiseguy <mrwiseguyromhacking@gmail.com>

* add gControllerPakScreen button

* change assert(false) in pak.cpp

---------

Co-authored-by: Alejandro Asenjo Nitti <96613413+sonicdcer@users.noreply.github.com>
Co-authored-by: Sonic Dreamcaster <alejandro.asenjo88@gmail.com>
Co-authored-by: Dario <dariosamo@gmail.com>
Co-authored-by: Mr-Wiseguy <mrwiseguyromhacking@gmail.com>

* port pr 730 from the decomp

Co-Authored-By: Jed Grabman <7600154+jedgrabman@users.noreply.github.com>

* rename file

* small fix

* finish fix time trial

---------

Co-authored-by: Jed Grabman <7600154+jedgrabman@users.noreply.github.com>
Co-authored-by: MegaMech <MegaMech@users.noreply.github.com>

* support a more flexible background

* remove useless function

* rename of some font

* experimental png

* migrate to the new initdata

* fix skybox and adjust minimap

* format in audio

* simplify player render

* simplify shell render and support custom texture of shell

* clean redshell texture

* format and multiple fix

* some update of name

* allow change icon of character

* more rename

* continue rename

* more documentation and simplification

* change lus and continue rename

* continue rename

* few fix for asan

* fix ghost

* Update menu_items.c

* fix mac error

* some test of tweak for texture

* some tweak

* some button constant

* finish fix ghost

* Update menu_items.c

* Update render_objects.c

* Update menu_items.c

* Update libultraship

* Update libultraship

* Delete valgrind.report

* Update libultraship

* callgrind benchmark

* Update valgrind_callgrind.sh

* fix animation

* some rename

* remove useless submodule

* Update libultraship

* fix assets

* fix mistake

* fix more mistake

* Update menu_items.c

* sync more rename with the decom + fix review

* fix a mistake

* fix more mistake

* re add the limit of fps

* fix some hd texture and minimap

* fix a name

* Update menu_items.c

* fix a regression

* fix some segment 5 texture (not all)

* Update camera.c

* improve performance of custom sprite

* fix flatten bug and add documentation on player vertex

* Update render_player.c

* fix data menu

* fix trophy for 50 and 150

* Update memory.c

* Update code_80057C60.c

* fix ghost

* fix boo tlut

* fix a mistake in yaml

* fix yaml

* Update common_data.yml

* add comment for segment 3

* allow even more change in texture

* Update common_data.yml

* Update update.inc.c

* Update camera.c

* Update some_data.c

* wip changes

* Update other_textures.yml

* More changes

* Update update_objects.c

* Fix compile

* Update memory.c

* Update memory.c

---------

Co-authored-by: MegaMech <MegaMech@users.noreply.github.com>

Co-authored-by: MegaMech <MegaMech@users.noreply.github.com>

* fix ghost

* remove a semi colon

* Fix camera overflow

* Update staff_ghosts.c

* Names and overflow fix