Update message_count only after expunge sends are finished or we'll get to infinite loop (broken in last commit).
Update message_count only after expunge sends are finished or we'll get to
infinite loop (broken in last commit).

--HG--
branch : HEAD

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