Added qdel(wires) to a bunch of objects Destroy proc.

Return ..()

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

@@ -99,6 +99,10 @@
 	..()
 	wires = new(src)
 
+/obj/item/device/pizza_bomb/Destroy()
+	qdel(wires)
+	wires = null
+	return ..()
 
 /obj/item/device/pizza_bomb/proc/disarm()
 	audible_message("\icon[src] \The [src] suddenly stops beeping and seems lifeless.")

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

@@ -93,7 +93,9 @@
 	qdel(wires)
 	wires = null
 	remove_radio_all(src) //Just to be sure
-	..()
+	patch_link = null
+	keyslot = null
+	return ..()
 
 /obj/item/device/radio/MouseDrop(obj/over_object, src_location, over_location)
 	var/mob/M = usr

code/game/objects/items/weapons/explosives.dm

@@ -21,6 +21,12 @@
 	image_overlay = image('icons/obj/assemblies.dmi', "plastic-explosive2")
 	..()
 
+/obj/item/weapon/c4/Destroy()
+	qdel(wires)
+	wires = null
+	target = null
+	return ..()
+
 /obj/item/weapon/c4/suicide_act(mob/user)
 	user.visible_message("<span class='suicide'>[user] activates the [src.name] and holds it above \his head! It looks like \he's going out with a bang!</span>")
 	var/message_say = "FOR NO RAISIN!"