Don't crash if mailbox named INBOX is listed in prefixless namespace, but which doesn't have inbox=yes. Instead the mailbox is simply not listed.
Don't crash if mailbox named INBOX is listed in prefixless namespace, but
which doesn't have inbox=yes. Instead the mailbox is simply not listed.

--HG--
branch : HEAD

dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot,dscho/dovecot