Stops shuttles from bringing background turfs with them. (#15580)

code/modules/mob/abstract/new_player/new_player.dm

@@ -9,7 +9,7 @@
 	invisibility = 101
 
 	density = 0
-	stat = 2
+	stat = DEAD
 	canmove = 0
 
 	anchored = 1	//  don't get pushed around

code/modules/mob/abstract/observer/observer.dm

@@ -45,7 +45,7 @@
 	see_in_dark = 100
 	verbs += /mob/abstract/observer/proc/dead_tele
 
-	stat = DEAD
+	set_stat(DEAD)
 
 	ghostimage = image(src.icon,src,src.icon_state)
 	SSmob.ghost_darkness_images |= ghostimage
@@ -277,6 +277,9 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 /mob/abstract/observer/is_active()
 	return FALSE
 
+/mob/abstract/observer/set_stat()
+	stat = DEAD // They are also always dead
+
 /mob/abstract/observer/Stat()
 	..()
 	if(statpanel("Status"))