Fixed nest overlays being deleted when unbuckling a mob.

code/game/objects/structures/stool_bed_chair_nest/alien_nests.dm

@@ -9,6 +9,11 @@
 	smooth = 1
 	can_be_unanchored = 0
 	canSmoothWith = null
+	var/image/nest_overlay
+
+/obj/structure/stool/bed/nest/New()
+	nest_overlay = image('icons/mob/alien.dmi', "nestoverlay", layer=MOB_LAYER - 0.2)
+	return ..()
 
 /obj/structure/stool/bed/nest/user_unbuckle_mob(mob/user as mob)
 	if(buckled_mob && buckled_mob.buckled == src)
@@ -59,12 +64,12 @@
 		M.pixel_y = 0
 		M.pixel_x = initial(M.pixel_x) + 2
 		M.layer = MOB_LAYER - 0.3
-		overlays += image('icons/mob/alien.dmi', "nestoverlay", layer=MOB_LAYER - 0.2)
+		overlays += nest_overlay
 	else
 		M.pixel_x = M.get_standard_pixel_x_offset(M.lying)
 		M.pixel_y = M.get_standard_pixel_y_offset(M.lying)
 		M.layer = initial(M.layer)
-		overlays.Cut()
+		overlays -= nest_overlay
 
 /obj/structure/stool/bed/nest/attackby(obj/item/weapon/W as obj, mob/user as mob, params)
 	var/aforce = W.force