Cube  Diff

	for (int x = s.x; x < s.xs + s.x; x++)
		for (int y = s.y; y < s.ys + s.y; y++)
			*q++ = *S(x, y);
	return b;
}

void
blockpaste(block &b)
blockpaste(const block &b)
{
	sqr *q = (sqr *)((&b) + 1);
	for (int x = b.x; x < b.xs + b.x; x++)
		for (int y = b.y; y < b.ys + b.y; y++)
			*S(x, y) = *q++;
	remipmore(b);
}