FONT_VARIABLE, TILESIZE/2, ALIGN_HRIGHT|ALIGN_VCENTRE,
(errors[w*h+w+y] ? COL_ERROR : COL_GRID), buf);
draw_update(dr, COORD(w)+1, COORD(y), BRBORDER-1, TILESIZE);
FONT_VARIABLE, TILESIZE/2, ALIGN_HRIGHT|ALIGN_VCENTRE,
(errors[w*h+w+y] ? COL_ERROR : COL_GRID), buf);
draw_update(dr, COORD(w)+1, COORD(y), BRBORDER-1, TILESIZE);