AI Execution Fix - Preiovusly AiExecute was being called even when in a menu, this was not correct behavior.

apps/openmw/mwmechanics/actors.cpp

@@ -30,6 +30,7 @@ namespace MWMechanics
 
         // AI
         CreatureStats& creatureStats =  MWWorld::Class::get (ptr).getCreatureStats (ptr);
+        if(!MWBase::Environment::get().getWindowManager()->isGuiMode())
             creatureStats.getAiSequence().execute (ptr);
     }