kdc_fast_hide_client
if (kdc_fast_hide_client(state->rstate))
if (kdc_fast_hide_client(rstate) && errpkt.client != NULL)
if (kdc_fast_hide_client(fast_state))
if (kdc_fast_hide_client(state) && errpkt.client != NULL)
kdc_fast_hide_client(struct kdc_request_state *state);