Decompile sleep.c and printutils.c

- Decompile sleep.c (OK)
- Decompile printutils.c (OK)
- Fix 1 non-matching in z_room.c
- Get rid of some magic numbers

src/code/gfxprint.c

@@ -388,7 +388,7 @@ Gfx* GfxPrint_Close(GfxPrint* this) {
 }
 
 void GfxPrint_VPrintf(GfxPrint* this, const char* fmt, va_list args) {
-    func_800FF340(&this->callback, fmt, args);
+    PrintUtils_VPrintf(&this->callback, fmt, args);
 }
 
 void GfxPrint_Printf(GfxPrint* this, const char* fmt, ...) {