Fixed date comparison in expire to use numeric instead of string compare

snebu.c

@@ -3408,7 +3408,7 @@ int expire(int argc, char **argv)
  " ) as d on (c.backupset_id = d.backupset_id) "
  " order by c.name, d.ranknum "
  ") as f on e.backupset_id = f.backupset_id "
- "where f.backupset_id is null and e.retention = '%q' and e.serial < '%d'%s%Q ",
+ "where f.backupset_id is null and e.retention = '%q' and e.serial < %d%s%Q ",
  min, retention, cutoffdate,
  strlen(bkname) > 0 ? " and e.name = " : "",
  strlen(bkname) > 0 ? bkname : "")), 0, 0, &sqlerr);