Fixup includes (#2483)

src/code/sys_math_atan.c

@@ -1,3 +1,4 @@
+#include "sys_math.h"
 #include "z64math.h"
 #include "macros.h"
 

src/code/sys_ucode.c

@@ -1,4 +1,5 @@
 #include "ultra64.h"
+#include "sys_ucode.h"
 
 u64* sDefaultGSPUCodeText = gspF3DZEX2_NoN_PosLight_fifoTextStart;
 u64* sDefaultGSPUCodeData = gspF3DZEX2_NoN_PosLight_fifoDataStart;

src/code/z_elf_message.c

@@ -2,6 +2,7 @@
 #include "rand.h"
 #include "z64play.h"
 #include "z64player.h"
+#include "z64quest_hint.h"
 #include "z64quest_hint_commands.h"
 #include "z64save.h"
 

src/code/z_olib.c

@@ -1,5 +1,6 @@
 #include "z64math.h"
 #include "libc64/math64.h"
+#include "z64olib.h"
 #include "z_lib.h"
 
 /**

src/code/z_ss_sram.c

@@ -1,4 +1,5 @@
 #include "ultra64.h"
+#include "z64ss_sram.h"
 
 #include "macros.h"
 #include "global.h"