ArgParser::argEndUnderOverlay()
{
    this->option_table = &(this->main_option_table);
    if (0 == o.under_overlay->filename)
    {
        usage(o.under_overlay->which + " file not specified");
    }
    o.under_overlay = 0;
}
ArgParser::argEndUnderOverlay()
{
    this->option_table = &(this->main_option_table);
    if (0 == o.under_overlay->filename)
    {
        usage(o.under_overlay->which + " file not specified");
    }
    o.under_overlay = 0;
}