xerror_occured = FALSE;
for (i = 0; i < MASK_LIST_SIZE; ++i)
XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask,
pointer_mode, GrabModeSync, None, ob_cursor(cur));
xerror_set_ignore(FALSE);
if (xerror_occured)
xerror_occured = FALSE;
for (i = 0; i < MASK_LIST_SIZE; ++i)
XGrabButton(ob_display, button, state | mask_list[i], win, FALSE, mask,
pointer_mode, GrabModeSync, None, ob_cursor(cur));
xerror_set_ignore(FALSE);
if (xerror_occured)