Core/ObjectMgr: Static members are no longer accessed through singleton

--HG--
branch : trunk

src/server/game/Entities/Object/Object.cpp

@@ -2271,7 +2271,7 @@ GameObject* WorldObject::SummonGameObject(uint32 entry, float x, float y, float
     if (!IsInWorld())
         return NULL;
 
-    GameObjectInfo const* goinfo = sObjectMgr.GetGameObjectInfo(entry);
+    GameObjectInfo const* goinfo = ObjectMgr::GetGameObjectInfo(entry);
     if (!goinfo)
     {
         sLog.outErrorDb("Gameobject template %u not found in database!", entry);