Use map type constants in map headers

src/battle_bg.c

@@ -18,6 +18,7 @@
 #include "text_window.h"
 #include "menu.h"
 #include "battle_setup.h"
+#include "constants/map_types.h"
 
 struct BattleBackground
 {

src/battle_setup.c

@@ -32,6 +32,7 @@
 #include "overworld.h"
 #include "field_weather.h"
 #include "gym_leader_rematch.h"
+#include "constants/map_types.h"
 
 enum
 {

src/bike.c

@@ -9,6 +9,7 @@
 #include "overworld.h"
 #include "constants/songs.h"
 #include "sound.h"
+#include "constants/map_types.h"
 
 extern bool8 gBikeCyclingChallenge;
 extern u8 gBikeCollisions;

src/overworld.c

@@ -57,6 +57,7 @@
 #include "malloc.h"
 #include "gpu_regs.h"
 #include "link_rfu.h"
+#include "constants/map_types.h"
 
 // event scripts
 extern const u8 EventScript_WhiteOut[];

src/rom6.c

@@ -15,6 +15,7 @@
 #include "sound.h"
 #include "sprite.h"
 #include "task.h"
+#include "constants/map_types.h"
 
 // static functions
 static void task08_080C9820(u8 taskId);

src/secret_base.c

@@ -39,6 +39,7 @@
 #include "link.h"
 #include "tv.h"
 #include "secret_base.h"
+#include "constants/map_types.h"
 
 extern void mapldr_default(void);