int grid_height = g->highest_y - g->lowest_y;
int w = grid_width * ds->tilesize / g->tilesize;
int h = grid_height * ds->tilesize / g->tilesize;
- draw_rect(dr, 0, 0, w + 2 * border, h + 2 * border, COL_BACKGROUND);
+ draw_rect(dr, 0, 0, w + 2 * border + 1, h + 2 * border + 1,
+ COL_BACKGROUND);
/* Draw clues */
for (i = 0; i < g->num_faces; i++) {