Register userdata cleanup callback.

Engine/Script/Addons.cpp

@@ -1229,6 +1229,8 @@ static void ScriptArrayClear(CScriptArray* ptr)
 
 void RegisterArray(asIScriptEngine* engine)
 {
+    // Register the object type user data clean up
+    engine->SetObjectTypeUserDataCleanupCallback(CleanupObjectTypeArrayCache, ARRAY_CACHE);
     engine->RegisterObjectType("Array<class T>", 0, asOBJ_REF | asOBJ_TEMPLATE);
     engine->RegisterObjectBehaviour("Array<T>", asBEHAVE_TEMPLATE_CALLBACK, "bool f(int&in)", asFUNCTION(ScriptArrayTemplateCallback), asCALL_CDECL);
     engine->RegisterObjectBehaviour("Array<T>", asBEHAVE_FACTORY, "Array<T>@ f(int& in)", asFUNCTIONPR(ScriptArrayFactory, (asIObjectType*), CScriptArray*), asCALL_CDECL);