when opening index, sync before updating cached fields so it won't print warnings if mails were deleted
when opening index, sync before updating cached fields so it won't print
warnings if mails were deleted

--HG--
branch : HEAD

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