Scripts/Scarlet Enclave: fix stolen effect for DK quest, which allowed to hang server by spawning unlimited number of mobs

src/server/scripts/EasternKingdoms/ScarletEnclave/chapter1.cpp

@@ -632,6 +632,8 @@ public:
                 if (caster->GetTypeId() == TYPEID_UNIT && caster->IsVehicle())
                 {
                     if (Unit *charmer = caster->GetCharmer())
+                    {
+                        if (charmer->HasAura(EFFECT_STOLEN_HORSE))
                         {
                             charmer->RemoveAurasDueToSpell(EFFECT_STOLEN_HORSE);
                             caster->RemoveFlag(UNIT_NPC_FLAGS, UNIT_NPC_FLAG_SPELLCLICK);
@@ -643,6 +645,7 @@ public:
                     }
                 }
             }
+        }
 
         void MoveInLineOfSight(Unit *who)
         {