ported battle_controllers from pokeem

include/battle_ai_script_commands.h

@@ -3,9 +3,7 @@
 
 #include "global.h"
 
-extern u8 sBattler_AI;
-
-void BattleAI_HandleItemUseBeforeAISetup(u8 defaultScoreMoves);
+void BattleAI_HandleItemUseBeforeAISetup(void);
 void BattleAI_SetupAIData(u8 defaultScoreMoves);
 u8 BattleAI_ChooseMoveOrAction(void);
 void ClearBankMoveHistory(u8 bank);