[MIRROR] [Fix] Visually closing fakewalls when in fact they shouldn't be closed (#26431)

* [Fix] Visually closing fakewalls when in fact they shouldn't be closed (#81353)

## About The Pull Request

Moves update_appearance() proc further after checking if it can be
closed.

It was possible to stand inside an open falsewall, try to close it only
for it to "close" visually and don't change any properties.

## Why It's Good For The Game

Less bugs is good. No more fake-closed falsewalls.

## Changelog

🆑
fix: Now falsewalls visually don't close when they shouldn't.
/🆑

* [Fix] Visually closing fakewalls when in fact they shouldn't be closed

---------

Co-authored-by: larentoun <31931237+larentoun@users.noreply.github.com>

code/game/objects/structures/false_walls.dm

@@ -43,12 +43,12 @@
 		return
 
 	opening = TRUE
-	update_appearance()
 	if(!density)
 		var/srcturf = get_turf(src)
 		for(var/mob/living/obstacle in srcturf) //Stop people from using this as a shield
 			opening = FALSE
 			return
+	update_appearance()
 	addtimer(CALLBACK(src, TYPE_PROC_REF(/obj/structure/falsewall, toggle_open)), 5)
 
 /obj/structure/falsewall/proc/toggle_open()