Merge pull request #10212 from Ghommie/Ghommie-cit471

Ports some hud and update_icon code updates.

code/modules/mob/mob_defines.dm

@@ -27,7 +27,7 @@
 	I'll make some notes on where certain variable defines should probably go.
 	Changing this around would probably require a good look-over the pre-existing code.
 	*/
-	var/zone_selected = null
+	var/zone_selected = BODY_ZONE_CHEST
 
 	var/computer_id = null
 	var/list/logging = list()