layout=index: Don't crash on mailbox_update() if the mailbox path couldn't be found.
layout=index: Don't crash on mailbox_update() if the mailbox path couldn't be found.

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