More GCC compatibility/warning fixes (#3118)

* Wrap >4-char literals in a MULTI_CHAR macro

Modern compilers do not support CW's non-standard behavior with
>4 char literals. We can, however, use a constexpr function to
compute the u64 values directly. This leaves <=4 char literals
unchanged.

* Replace non-pointer usages of NULL with 0

* Define NULL to nullptr on C++11 and above

* Fix more -Wpointer-arith and -Woverflow warnings

* Replace u32/s32 with uintptr_t/intptr_t where appropriate

* JSUOutputStream: Overload all standard int types

1 files changed, 2 insertions, 2 deletions

diff --git a/src/d/actor/d_a_alink.cpp b/src/d/actor/d_a_alink.cpp
index a2b5a11f6d..5f6bd7ca17 100644
--- a/src/d/actor/d_a_alink.cpp
+++ b/src/d/actor/d_a_alink.cpp
@@ -3082,7 +3082,7 @@ cXyz* daAlink_c::getNeckAimPos(cXyz* param_0, int* param_1, int param_2) {
             }
         } else if (field_0x35c4.abs2XZ() > 1.0f && checkModeFlg(1)) {
             f32 var_f31;
-            if (checkWolf() != NULL) {
+            if (checkWolf() != 0) {
                 var_f31 = 80.0f;
             } else {
                 var_f31 = 150.0f;
@@ -12223,7 +12223,7 @@ BOOL daAlink_c::checkGroundSpecialMode() {
         return procScreamWaitInit();
     }
 
-    return NULL;
+    return 0;
 }
 
 int daAlink_c::commonCheckNextAction(int param_0) {