CreatureAI: Adjust AI behavior when a charm ends. OnCharmed will be invoked on the creature's base (non-charmed) AI, allowing the AI to react to the creature no longer being charmed.

src/server/game/AI/SmartScripts/SmartAI.cpp

@@ -653,8 +653,8 @@ void SmartAI::OnCharmed(bool apply)
 {
     GetScript()->ProcessEventsFor(SMART_EVENT_CHARMED, NULL, 0, 0, apply);
 
-    if (!apply && !me->IsInEvadeMode() && me->GetCharmerGUID())
-        if (Unit* charmer = ObjectAccessor::GetUnit(*me, me->GetCharmerGUID()))
+    if (!apply && !me->IsInEvadeMode())
+        if (Unit* charmer = me->GetCharmer())
             AttackStart(charmer);
 }