feat(Core/Instance): Add instance validation for creature scripts (#4596)

src/server/scripts/EasternKingdoms/Gnomeregan/gnomeregan.h

@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
+ */
+
+#ifndef DEF_GNOMEREGAN_H
+#define DEF_GNOMEREGAN_H
+
+#include "CreatureAIImpl.h"
+
+#define GnomereganScriptName "instance_gnomeregan"
+
+template <class AI, class T>
+inline AI* GetGnomereganAI(T* obj)
+{
+    return GetInstanceAI<AI>(obj, GnomereganScriptName);
+}
+
+#endif

src/server/scripts/EasternKingdoms/Gnomeregan/instance_gnomeregan.cpp

@@ -2,6 +2,7 @@
  * Originally written by Xinef - Copyright (C) 2016+ AzerothCore <www.azerothcore.org>, released under GNU AGPL v3 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-AGPL3
 */
 
+#include "gnomeregan.h"
 #include "InstanceScript.h"
 #include "PassiveAI.h"
 #include "Player.h"
@@ -38,7 +39,7 @@ public:
 
     CreatureAI* GetAI(Creature* creature) const override
     {
-        return new npc_kernobeeAI(creature);
+        return GetGnomereganAI<npc_kernobeeAI>(creature);
     }
 
     bool OnQuestAccept(Player* player, Creature* creature, const Quest* quest) override