Ports "Replaces radio channel names and keys with defines"

code/game/machinery/bank_machine.dm

@@ -6,7 +6,7 @@
 	var/siphoning = FALSE
 	var/next_warning = 0
 	var/obj/item/radio/radio
-	var/radio_channel = "Common"
+	var/radio_channel = RADIO_CHANNEL_COMMON
 	var/minimum_time_between_warnings = 400
 
 /obj/machinery/computer/bank_machine/Initialize()

code/game/machinery/cloning.dm

@@ -31,7 +31,7 @@
 	var/internal_radio = TRUE
 	var/obj/item/radio/radio
 	var/radio_key = /obj/item/encryptionkey/headset_med
-	var/radio_channel = "Medical"
+	var/radio_channel = RADIO_CHANNEL_MEDICAL
 
 	var/obj/effect/countdown/clonepod/countdown