int max_drop = 1, int move_flags = 1 << 5)
const int move_flags, int max_drop = 1)
	int is_blocked(int height, int lift, int tx, int ty, int& new_lift,							int max_drop = 1, int move_flags = 1 << 5)		{ return cache->is_blocked(height, lift, tx, ty, new_lift,								max_drop, move_flags); }