auth: Set auto_state->state explicitly

When a new ssh_auth_auto_state_struct is allocated in
ssh_userauth_publickey_auto(), initialize the state explicitly for
better readability.

Fixes T194

Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 7e3995d2dd)

src/auth.c

@@ -1031,6 +1031,9 @@ int ssh_userauth_publickey_auto(ssh_session session,
             ssh_set_error_oom(session);
             return SSH_AUTH_ERROR;
         }
+
+        /* Set state explicitly */
+        session->auth.auto_state->state = SSH_AUTH_AUTO_STATE_NONE;
     }
     state = session->auth.auto_state;
     if (state->state == SSH_AUTH_AUTO_STATE_NONE) {