Some pAI fixes

code/game/objects/items/devices/paicard.dm

@@ -10,15 +10,14 @@
 	resistance_flags = FIRE_PROOF | ACID_PROOF | INDESTRUCTIBLE
 
 /obj/item/device/paicard/Initialize()
-	..()
 	SSpai.pai_card_list += src
 	add_overlay("pai-off")
+	return ..()
 
 /obj/item/device/paicard/Destroy()
 	//Will stop people throwing friend pAIs into the singularity so they can respawn
 	SSpai.pai_card_list -= src
-	if(!isnull(pai))
-		pai.death(0)
+	QDEL_NULL(pai)
 	return ..()
 
 /obj/item/device/paicard/attack_self(mob/user)
@@ -26,9 +25,9 @@
 		return
 	user.set_machine(src)
 	var/dat = "<TT><B>Personal AI Device</B><BR>"
-	if(pai && (!pai.master_dna || !pai.master))
-		dat += "<a href='byond://?src=\ref[src];setdna=1'>Imprint Master DNA</a><br>"
 	if(pai)
+		if(!pai.master_dna || !pai.master)
+			dat += "<a href='byond://?src=\ref[src];setdna=1'>Imprint Master DNA</a><br>"
 		dat += "Installed Personality: [pai.name]<br>"
 		dat += "Prime directive: <br>[pai.laws.zeroth]<br>"
 		for(var/slaws in pai.laws.supplied)
@@ -86,7 +85,7 @@
 					to_chat(pai, "<span class='danger'>Byte by byte you lose your sense of self.</span>")
 					to_chat(pai, "<span class='userdanger'>Your mental faculties leave you.</span>")
 					to_chat(pai, "<span class='rose'>oblivion... </span>")
-					pai.death(0)
+					removePersonality()
 		if(href_list["wires"])
 			var/wire = text2num(href_list["wires"])
 			if(pai.radio)
@@ -119,9 +118,9 @@
 	audible_message("\The [src] plays a cheerful startup noise!")
 
 /obj/item/device/paicard/proc/removePersonality()
-	src.pai = null
-	src.cut_overlays()
-	src.add_overlay("pai-off")
+	QDEL_NULL(pai)
+	cut_overlays()
+	add_overlay("pai-off")
 
 /obj/item/device/paicard/proc/setEmotion(emotion)
 	if(pai)

code/modules/mob/living/silicon/pai/pai.dm

@@ -79,7 +79,7 @@
 
 /mob/living/silicon/pai/Destroy()
 	GLOB.pai_list -= src
-	..()
+	return ..()
 
 /mob/living/silicon/pai/Initialize()
 	var/obj/item/device/paicard/P = loc