[ntsc-1.2] Match game.c, z_play.c, z_room.c (#2117)

* Match z_room.c

* Match game.c and z_play.c

* Add undefined syms

* Rewrite condition based on other file matches

src/code/code_n64dd_800AD4C0.c

@@ -3,7 +3,6 @@
 #include "n64dd.h"
 
 // TODO functions of unknown prototype
-extern char func_801C8510_unknown[];
 extern char osGetIntMask[];
 extern char osSetTime[];