Fix obsessed not respecting player preferences (#44609)

Also fixes a runtime due to a missing early return

code/datums/brain_damage/creepy_trauma.dm

@@ -24,6 +24,7 @@
 		if(!obsession)//we didn't find one
 			lose_text = ""
 			qdel(src)
+			return
 	gain_text = "<span class='warning'>You hear a sickening, raspy voice in your head. It wants one small task of you...</span>"
 	owner.mind.add_antag_datum(/datum/antagonist/obsessed)
 	antagonist = owner.mind.has_antag_datum(/datum/antagonist/obsessed)

code/modules/events/creep_awakening.dm

@@ -9,7 +9,7 @@
 
 /datum/round_event/obsessed/start()
 	for(var/mob/living/carbon/human/H in shuffle(GLOB.player_list))
-		if(!H.client)
+		if(!H.client || !(ROLE_OBSESSED in H.client.prefs.be_special))
 			continue
 		if(H.stat == DEAD)
 			continue