dict quota: When updating quota don't look up the current byte/msg limit if there's no limit for it.
dict quota: When updating quota don't look up the current byte/msg limit if there's no limit for it.

--HG--
branch : HEAD

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