More and more Destroy() cleanups all across the board - Return qdel hints.

code/controllers/communications.dm

@@ -314,7 +314,6 @@ var/global/datum/controller/radio/radio_controller
 			devices_line -= null
 		if (devices_line.len==0)
 			devices -= devices_filter
-			del(devices_line)
 
 /datum/signal
 	var/obj/source

code/controllers/voting.dm

@@ -23,9 +23,15 @@ var/global/list/round_voters = list() // Keeps track of the individuals voting f
 /datum/controller/vote/New()
 	if(vote != src)
 		if(istype(vote))
-			del(vote)
+			Recover()
+			qdel(vote)
 		vote = src
 
+/datum/controller/vote/Destroy()
+	..()
+	// Tell qdel() to Del() this object.
+	return QDEL_HINT_HARDDEL_NOW
+
 /datum/controller/vote/proc/process()	//called by master_controller
 	if(mode)
 		// No more change mode votes after the game has started.