Core/Spell: Gordunni Trap

Casting npc of the trap should not remove the summoned chest on despawn.
Solves #4811

src/server/scripts/Kalimdor/zone_feralas.cpp

@@ -221,7 +221,10 @@ class spell_gordunni_trap : public SpellScriptLoader
             {
                 if (Unit* caster = GetCaster())
                     if (GameObject* chest = caster->SummonGameObject(GO_GORDUNNI_DIRT_MOUND, caster->GetPositionX(), caster->GetPositionY(), caster->GetPositionZ(), 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0))
+                    {
                         chest->SetSpellId(GetSpellInfo()->Id);
+                        caster->RemoveGameObject(chest, false);
+                    }
             }
 
             void Register()