Set medical HUD status on login and logout

code/modules/mob/living/login.dm

@@ -30,3 +30,5 @@
 	var/datum/antagonist/changeling/changeling = mind.has_antag_datum(/datum/antagonist/changeling)
 	if(changeling)
 		changeling.regain_powers()
+
+	med_hud_set_status()

code/modules/mob/living/logout.dm

@@ -3,3 +3,4 @@
 	..()
 	if(!key && mind)	//key and mind have become separated.
 		mind.active = 0	//This is to stop say, a mind.transfer_to call on a corpse causing a ghost to re-enter its body.
+	med_hud_set_status()