Fix some more GCC warnings, mark some bugs based on GCC warnings (#2309)

* Fix some more GCC warnings, mark some bugs based on GCC warnings

* Weird formatting

* Suggested changes

* More weird indentation I guess

* UNREACHABLE() macro, add missing NORETURNs to fault_n64.c

* AVOID_UB for PAL path in z_file_nameset.c

* Remove comments about return types

* Remove temp no longer needed

src/code/ucode_disas.c

@@ -1,6 +1,8 @@
 #include "global.h"
 #include "ucode_disas.h"
 
+#if DEBUG_FEATURES
+
 typedef struct F3dzexConst {
     /* 0x00 */ u32 value;
     /* 0x04 */ const char* name;
@@ -1244,3 +1246,5 @@ void UCodeDisas_RegisterUCode(UCodeDisas* this, s32 count, UCodeInfo* ucodeArray
 void UCodeDisas_SetCurUCode(UCodeDisas* this, void* ptr) {
     UCodeDisas_SetCurUCodeImpl(this, ptr);
 }
+
+#endif