Fixes invalid pointers to a battle dangling when a battle is removed.

Signed-off-by: Deukhoofd <Deukhoofd@gmail.com>

CInterface/Battling/Battle.cpp

@@ -84,4 +84,6 @@ export uint8_t CreatureLib_Battle_RegisterEventListener(Battle* p, void (*func)(
 }
 export const HistoryHolder* CreatureLib_Battle_GetHistory(Battle* p) { return &p->GetHistory(); }
 
+export uint8_t CreatureLib_Battle_EndBattle(Battle* p) { Try(p->EndBattle()) }
+
 SIMPLE_GET_FUNC(Battle, GetLastTurnTimeMicroseconds, long);