rl_bind_key_if_unbound (key, default_func)
     int key;
     rl_command_func_t *default_func;
{
  char keyseq[2];

  keyseq[0] = (unsigned char)key;
  keyseq[1] = '\0';
  return (rl_bind_keyseq_if_unbound_in_map (keyseq, default_func, _rl_keymap));
}
rl_bind_key_if_unbound (key, default_func)
     int key;
     rl_command_func_t *default_func;
{
  char keyseq[2];

  keyseq[0] = (unsigned char)key;
  keyseq[1] = '\0';
  return (rl_bind_keyseq_if_unbound_in_map (keyseq, default_func, _rl_keymap));
}