r24281: Fix bug found by Herb. The vuid entry in the cli_state structure gets

r24281: Fix bug found by Herb. The vuid entry in the cli_state structure gets
left as nonzero as returned by the failed cli_session_setup_spnego. When we then try
to authenticate as the user in cli_session_setup this returns an
error "Bad userid" (as seen in wireshark).
"We should only leave cli->vuid != 0 on success. Looks like it's
getting set in the cli_session_setup_blob_receive() call and not
cleared again on error."
Jeremy.
(This used to be commit fa8e66dd8d2c68b91b27169c3c43820989f58758)