some small things (#17693)

* some small things

* .

* clean this up

* potentially fix nulls in player list

* .

* Fixes

* Update machine_stacking.dm

---------

Co-authored-by: C.L. <killer65311@gmail.com>

code/datums/mind.dm

@@ -1,32 +1,22 @@
 /*	Note from Carnie:
 		The way datum/mind stuff works has been changed a lot.
 		Minds now represent IC characters rather than following a client around constantly.
-
 	Guidelines for using minds properly:
-
 	-	Never mind.transfer_to(ghost). The var/current and var/original of a mind must always be of type mob/living!
 		ghost.mind is however used as a reference to the ghost's corpse
-
 	-	When creating a new mob for an existing IC character (e.g. cloning a dead guy or borging a brain of a human)
 		the existing mind of the old mob should be transfered to the new mob like so:
-
 			mind.transfer_to(new_mob)
-
 	-	You must not assign key= or ckey= after transfer_to() since the transfer_to transfers the client for you.
 		By setting key or ckey explicitly after transfering the mind with transfer_to you will cause bugs like DCing
 		the player.
-
 	-	IMPORTANT NOTE 2, if you want a player to become a ghost, use mob.ghostize() It does all the hard work for you.
-
 	-	When creating a new mob which will be a new IC character (e.g. putting a shade in a construct or randomly selecting
 		a ghost to become a xeno during an event). Simply assign the key or ckey like you've always done.
-
 			new_mob.key = key
-
 		The Login proc will handle making a new mob for that mobtype (including setting up stuff like mind.name). Simple!
 		However if you want that mind to have any special properties like being a traitor etc you will have to do that
 		yourself.
-
 */
 
 /datum/mind
@@ -82,7 +72,7 @@
 	purchase_log = list()
 	..()
 
-/datum/mind/proc/transfer_to(mob/living/new_character)
+/datum/mind/proc/transfer_to(mob/living/new_character, force = FALSE)
 	if(!istype(new_character))
 		to_world_log("## DEBUG: transfer_to(): Some idiot has tried to transfer_to() a non mob/living mob. Please inform Carn")
 	if(current)					//remove ourself from our old body's mind variable
@@ -100,7 +90,7 @@
 	if(changeling)
 		new_character.make_changeling()
 
-	if(active)
+	if(active || force)
 		new_character.key = key		//now transfer the key to link the client to our new body
 
 	if(new_character.client)