replace VERSION_NONE with NULL

include/global/pm_version.h

@@ -1,18 +1,17 @@
 #ifndef POKEPLATINUM_PM_VERSION_H
 #define POKEPLATINUM_PM_VERSION_H
 
-#define VERSION_NONE 0
-#define SAPPHIRE     1
-#define RUBY         2
-#define EMERALD      3
-#define FIRERED      4
-#define LEAFGREEN    5
-#define HEARTGOLD    7
-#define SOULSILVER   8
-#define DIAMOND      10
-#define PEARL        11
-#define PLATINUM     12
-#define COLOSSEUM    15
+#define SAPPHIRE   1
+#define RUBY       2
+#define EMERALD    3
+#define FIRERED    4
+#define LEAFGREEN  5
+#define HEARTGOLD  7
+#define SOULSILVER 8
+#define DIAMOND    10
+#define PEARL      11
+#define PLATINUM   12
+#define COLOSSEUM  15
 
 #define JAPANESE 1
 #define ENGLISH  2

src/main.c

@@ -71,7 +71,7 @@ void NitroMain(void)
     InitGraphics();
     InitKeypadAndTouchpad();
 
-    SetGBACartridgeVersion(VERSION_NONE);
+    SetGBACartridgeVersion(NULL);
     PM_GetBackLight(&sSavedBacklightState, NULL);
     sub_0202419C();
     InitRTC();

src/overlay097/ov97_0222D30C.c

@@ -2445,7 +2445,7 @@ static int ov97_022301BC(OverlayManager *param0, int *param1)
     Heap_Destroy(86);
 
     if (v0->unk_1638 == 2) {
-        SetGBACartridgeVersion(VERSION_NONE);
+        SetGBACartridgeVersion(NULL);
     }
 
     ov97_02238400(0);