Makes all synthetic brains radio-enabled.

Mostly because the old radio-enabled MMIs were almost never used. Changes all MMIs and their subtypes (posi and drone brains) to have a radio inside of them, which can only be used when the brain is outside of a body. This radio can be used to talk over the common channel, in case you get left on a table somewhere by an absent-minded roboticist. However, the radio can also be disabled, in case an antag has you and doesn't want to to scream for help.

Since this makes the old radio-enabled MMIs obsolete, they're no longer printable(although it's still defined in the code so I don't have to touch the map file). Also fixes a telecomms runtime with brains talking over the radio.

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

@@ -317,6 +317,20 @@
 	item_state = "headset"
 	ks2type = /obj/item/device/encryptionkey/heads/hos
 
+/obj/item/device/radio/headset/mmi_radio
+	name = "brain-integrated radio"
+	desc = "MMIs and synthetic brains are often equipped with these."
+	icon = 'icons/obj/robot_component.dmi'
+	icon_state = "radio"
+	item_state = "headset"
+	var/mmiowner = null
+	var/radio_enabled = 1
+
+/obj/item/device/radio/headset/mmi_radio/receive_range(freq, level)
+	if (!radio_enabled || istype(src.loc.loc, /mob/living/silicon) || istype(src.loc.loc, /obj/item/organ/internal))
+		return -1 //Transciever Disabled.
+	return ..(freq, level, 1)
+
 /obj/item/device/radio/headset/attackby(obj/item/weapon/W as obj, mob/user as mob)
 //	..()
 	user.set_machine(src)