Fix missing wall for last standing player

Player.gd

@@ -88,7 +88,6 @@ func _on_tween_completed(_o, key):
 func _on_crash(body):
 	if running:
 		stop()
-		generate_wall()
 		# TODO : use enum for blocks
 		grid.set_cell(posix, posiy, 2)
 		emit_signal("crash")
@@ -170,6 +169,7 @@ func has_block_on(left_or_right:int):
 func stop():
 	if running:
 		remove_from_group("running")
+		generate_wall()
 	running = false
 
 func spring():