Core/Scripting: add the ability to access loot/go state changed events for gameobjects from cpp scripting. (malcrom's idea)

src/server/game/Scripting/ScriptMgr.h

@@ -473,6 +473,12 @@ class GameObjectScript : public ScriptObject, public UpdatableScript<GameObject>
         // Called when the game object is damaged (destructible buildings only).
         virtual void OnDamaged(GameObject* /*go*/, Player* /*player*/) { }
 
+        // Called when the game object loot state is changed.
+        virtual void OnLootStateChanged(GameObject* /*go*/, uint32 /*state*/, Unit* /*unit*/) { }
+
+        // Called when the game object state is changed.
+        virtual void OnGameObjectStateChanged(GameObject* /*go*/, uint32 /*state*/) { }
+
         // Called when a GameObjectAI object is needed for the gameobject.
         virtual GameObjectAI* GetAI(GameObject* /*go*/) const { return NULL; }
 };
@@ -914,6 +920,8 @@ class ScriptMgr
         uint32 GetDialogStatus(Player* player, GameObject* go);
         void OnGameObjectDestroyed(GameObject* go, Player* player);
         void OnGameObjectDamaged(GameObject* go, Player* player);
+        void OnGameObjectLootStateChanged(GameObject* go, uint32 state, Unit* unit);
+        void OnGameObjectStateChanged(GameObject* go, uint32 state);
         void OnGameObjectUpdate(GameObject* go, uint32 diff);
         GameObjectAI* GetGameObjectAI(GameObject* go);