Fix CVE-2019-13225: problem in converting if-then-else pattern to bytecode.
clear_node_opt_info(OptNode* opt)
{
  clear_mml(&opt->len);
  clear_opt_anc_info(&opt->anc);
  clear_opt_exact(&opt->sb);
  clear_opt_exact(&opt->sm);
  clear_opt_exact(&opt->spr);
  clear_opt_map(&opt->map);
}

clear_node_opt_info(OptNode* opt)
{
  clear_mml(&opt->len);
  clear_opt_anc_info(&opt->anc);
  clear_opt_exact(&opt->sb);
  clear_opt_exact(&opt->sm);
  clear_opt_exact(&opt->spr);
  clear_opt_map(&opt->map);
}
