bool FloorAtGridNo(UINT32 const map_idx)
{
	DebugMsg(TOPIC_JA2, DBG_LEVEL_0, String("MAP_IDX: %d", map_idx));
	for (LEVELNODE const* i = gpWorldLevelData[map_idx].pLandHead; i;)
	{
		DebugMsg(TOPIC_JA2, DBG_LEVEL_0, String("i->usIndex: %d", i->usIndex));