Core/Wintergrasp: finish implementation for battlefields. this is highly experimental enable at you're own risk. will almost definatly cause issues with the wintergrasp patch floating around

src/server/game/Scripting/ScriptMgr.cpp

@@ -723,6 +723,14 @@ bool ScriptMgr::OnDummyEffect(Unit* caster, uint32 spellId, SpellEffIndex effInd
     return tmpscript->OnDummyEffect(caster, spellId, effIndex, target);
 }
 
+GameObjectAI* ScriptMgr::GetGameObjectAI(GameObject* go)
+{
+    ASSERT(go);
+
+    GET_SCRIPT_RET(GameObjectScript, go->GetScriptId(), tmpscript, NULL);
+    return tmpscript->GetAI(go);
+}
+
 bool ScriptMgr::OnQuestAccept(Player* player, Item* item, Quest const* quest)
 {
     ASSERT(player);