Miscellaneous fixes (#1349)

fixes posibrain message
fixes a runtime error with devouring
small optimisation to radios

code/_helpers/game.dm

@@ -242,7 +242,7 @@
 			if(ear)
 				// Ghostship is magic: Ghosts can hear radio chatter from anywhere
 				if(speaker_coverage[ear] || (istype(M, /mob/dead/observer) && (M.client) && (M.client.prefs.toggles & CHAT_GHOSTRADIO)))
-					. |= M		// Since we're already looping through mobs, why bother using |= ? This only slows things down.
+					. += M
 	return .
 
 #define SIGN(X) ((X<0)?-1:1)

code/modules/ghosttrap/trap.dm

@@ -109,7 +109,7 @@ var/list/ghost_traps
 	target << "<b>Remember, the purpose of your existence is to serve the crew and the station. Above all else, do no harm.</b>"
 	target << "<b>Use say [target.get_language_prefix()]b to speak to other artificial intelligences.</b>"
 	var/turf/T = get_turf(target)
-	T.visible_message("<span class='notice'>\The [src] chimes quietly.</span>")
+	T.visible_message("<span class='notice'>\The [target] chimes quietly.</span>")
 	var/obj/item/device/mmi/digital/posibrain/P = target.loc
 	if(!istype(P)) //wat
 		return

code/modules/mob/living/devour.dm

@@ -170,7 +170,7 @@
 				break
 		else
 			devouring = null
-			if (victimloc != victim.loc)
+			if (victim && victimloc != victim.loc)
 				src << "<span class='danger'>[victim] moved away, you need to keep it still. Try grabbing, stunning or killing it first.</span>"
 			else if (ourloc != src.loc)
 				src << "<span class='danger'>You moved! Devouring cancelled</span>"