LIN_RESTART
if (check->lin_count >= LIN_RESTART / 2 && check->altinfo == NULL) {
if (check->lin_count >= LIN_RESTART) {
if ((info = check->altinfo) && info->lin_count >= LIN_RESTART / 2) {
info->lin_count == LIN_RESTART - 2
if (info->lin_count >= LIN_RESTART / 2 &&