imapc: Fixed crash on saving/copying if remote IMAP server didn't support UIDPLUS.
imapc: Fixed crash on saving/copying if remote IMAP server didn't support UIDPLUS.

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot