agent: Clean up error initialize/return.
* agent/call-pinentry.c (start_pinentry): Return RC. * agent/command-ssh.c (ssh_handler_request_identities): Don't set ERR. * agent/findkey.c (try_unprotect_cb): Return ERR. (unprotect): Don't set RC. * agent/gpg-agent.c (handle_connections): Don't set fd.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>