Relevanssi taxonomy parents indexing

foreach ($ptagobj as $ptag) {
    if (is_object($ptag)) {
        $tagstr .= $ptag->name . ' ';
    }
    if ("on" == get_option("relevanssi_include_taxonomy_parents")) {
        $taxonomy_parent = $ptag;
        while ($taxonomy_parent->parent && ($taxonomy_parent->parent != $taxonomy_parent->term_id)) {
            $taxonomy_parent = get_term($taxonomy_parent->parent, $taxonomy);
            if (is_object($taxonomy_parent)) {
                $tagstr .= $taxonomy_parent->name . ' ';
            }
        }
    }
}