Makes the station Z level into a list instead of a single define

code/game/machinery/computer/communications.dm

@@ -54,7 +54,7 @@
 /obj/machinery/computer/communications/Topic(href, href_list)
 	if(..())
 		return
-	if (z != ZLEVEL_STATION && z != ZLEVEL_CENTCOM) //Can only use on centcom and SS13
+	if(!(z in GLOB.station_z_levels) && z != ZLEVEL_CENTCOM) //Can only use on centcom and SS13
 		to_chat(usr, "<span class='boldannounce'>Unable to establish a connection</span>: \black You're too far away from the station!")
 		return
 	usr.set_machine(src)

code/game/machinery/computer/prisoner.dm

@@ -56,7 +56,7 @@
 
 			var/loc_display = "Unknown"
 			var/mob/living/M = T.imp_in
-			if(Tr.z == ZLEVEL_STATION && !isspaceturf(M.loc))
+			if((Tr.z in GLOB.station_z_levels) && !isspaceturf(M.loc))
 				var/turf/mob_loc = get_turf(M)
 				loc_display = mob_loc.loc