fix(blueprints): fix zones create (maybe)

#12970

code/game/objects/items/blueprints.dm

@@ -138,6 +138,9 @@ move an amendment</a> to the drawing, or <a href='?src=\ref[src];action=delete_a
 
 	A.always_unpowered = 0
 
+	var/zone/Z = new
+	move_turfs_to_zone(turfs, Z)
+
 	set_next_think(world.time + 1 SECOND)
 
 /obj/item/blueprints/think()
@@ -148,6 +151,10 @@ move an amendment</a> to the drawing, or <a href='?src=\ref[src];action=delete_a
 		//oldarea.contents.Remove(usr.loc) // not needed
 		//T.loc = A //error: cannot change constant value
 
+/obj/item/blueprints/proc/move_turfs_to_zone(list/turf/turfs, zone/Z)
+	for(var/turf/T in turfs)
+		Z.add(T)
+
 /obj/item/blueprints/proc/edit_area(mob/user)
 	if(!user)
 		return