Fix for checking if new maildir files can be given UIDs beginning from the eexisting maildir UIDs.
Fix for checking if new maildir files can be given UIDs beginning from the
eexisting maildir UIDs.

--HG--
branch : HEAD

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