Function clear_stale_map

src/detect.c:317–331

* When doing detection, remove stale data from the map display (corpses * rotted away, objects carried away by monsters, etc) so that it won't * reappear after the detection has completed. Return true if noticeable * change occurs. */

 * change occurs.
 */
staticfn boolean
clear_stale_map(char oclass, unsigned material)
{
    coordxy zx, zy;
    boolean change_made = FALSE;

    for (zx = 1; zx < COLNO; zx++)
        for (zy = 0; zy < ROWNO; zy++)
            if (check_map_spot(zx, zy, oclass, material)) {
                unmap_object(zx, zy);
                change_made = TRUE;
            }

    return change_made;
}

/* look for gold, on the floor or in monsters' possession */
int