mbox: Fixed infinite looping and other incorrectness in istream-raw-mbox. This was caused by the recent istream invalidation checks in i_stream_get_data().
mbox: Fixed infinite looping and other incorrectness in istream-raw-mbox.
This was caused by the recent istream invalidation checks in
i_stream_get_data().

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