lib-index: Make sure we never go to infinite loop if fsck can't fix syncing problem.
lib-index: Make sure we never go to infinite loop if fsck can't fix syncing problem.

jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot