Fix handling an optional invalid cipher at the end of data-ciphers

Fix handling an optional invalid cipher at the end of data-ciphers

If an optional cipher was found at the end of --data-cipher that was
not available, it would reset the error and allow non optional ciphers
to be ignored.

Signed-off-by: Arne Schwabe <arne@rfc2549.org>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20211206150852.3142891-1-arne@rfc2549.org>
URL: https://www.mail-archive.com/search?l=mid&q=20211206150852.3142891-1-arne@rfc2549.org
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit 868433857fbf8d71515ac0ffecb98eae893515dc)