Few small optimizations here and there

src/server/game/Entities/GameObject/GameObject.cpp

@@ -714,7 +714,7 @@ void GameObject::Update(uint32 diff)
             if (!m_spawnedByDefault)
             {
                 m_respawnTime = 0;
-                UpdateObjectVisibility();
+                DestroyForNearbyPlayers(); // old UpdateObjectVisibility()
                 return;
             }
 
@@ -724,7 +724,7 @@ void GameObject::Update(uint32 diff)
             if (sWorld->getBoolConfig(CONFIG_SAVE_RESPAWN_TIME_IMMEDIATELY))
                 SaveRespawnTime();
 
-            UpdateObjectVisibility();
+            DestroyForNearbyPlayers(); // old UpdateObjectVisibility()
 
             break;
         }