fix(Core/Creature): Prevent combat movement disabled creatures from r… (#18428)

* fix(Core/Creature): Prevent combat movement disabled creatures from repositioning if target moves within model boundary

* fixbuild

* Apply suggestions from code review

src/server/scripts/EasternKingdoms/Karazhan/bosses_opera.cpp

@@ -159,7 +159,7 @@ struct boss_dorothee : public ScriptedAI
 {
     boss_dorothee(Creature* creature) : ScriptedAI(creature)
     {
-        SetCombatMovement(false);
+        me->SetCombatMovement(false);
         //this is kinda a big no-no. but it will prevent her from moving to chase targets. she should just cast her spells. in this case, since there is not really something to LOS her with or get out of range this would work. but a more elegant solution would be better
 
         instance = creature->GetInstanceScript();