Core/SmartScript: update ACTION_GO_SET_GO_STATE

GO_STATE_ACTIVE             = 0,                        // show in world as used and not reset (closed door open)
GO_STATE_READY              = 1,                        // show in world as ready (closed door close)
GO_STATE_ACTIVE_ALTERNATIVE = 2                         // show in world as used in alt way and not reset (closed door open by cannon fire)

Credits to Sunwell

src/server/game/AI/SmartScripts/SmartScript.cpp

@@ -2062,6 +2062,20 @@ void SmartScript::ProcessAction(SmartScriptHolder& e, Unit* unit, uint32 var0, u
                 if (IsGameObject(*itr))
                     (*itr)->ToGameObject()->SetLootState((LootState)e.action.setGoLootState.state);
 
+            delete targets;
+            break;
+        }
+		case SMART_ACTION_GO_SET_GO_STATE:
+        {
+            ObjectList* targets = GetTargets(e, unit);
+
+            if (!targets)
+                break;
+
+            for (ObjectList::const_iterator itr = targets->begin(); itr != targets->end(); ++itr)
+                if (IsGameObject(*itr))
+                    (*itr)->ToGameObject()->SetGoState((GOState)e.action.goState.state);
+
             delete targets;
             break;
         }