if ( $comment->comment_parent == 0 ) : // This comment is top level ?>
<thr:in-reply-to ref="<?php the_guid(); ?>" href="<?php the_permalink_rss() ?>" type="<?php bloginfo_rss('html_type'); ?>" />
<?php else : // This comment is in reply to another comment
if ( $comment->comment_parent == 0 ) : // This comment is top level ?>
<thr:in-reply-to ref="<?php the_guid(); ?>" href="<?php the_permalink_rss() ?>" type="<?php bloginfo_rss('html_type'); ?>" />
<?php else : // This comment is in reply to another comment