phptemplate is generating invalid html code for primary/secondary links take 2

    <?php if (is_array($secondary_links)): ?>
      <ul id="secondary">
      <?php foreach (array_reverse($secondary_links) as $link): ?>
        <li><?php print phptemplate_wrap_links($link, 2); ?></li>
      <?php endforeach; ?>
      </ul>
    <?php endif; ?>

if you dont define any secondary links you get as output

<ul id="secondary">
            </ul>

this is incorrect xhtml:

xmllint --valid --noout t.xml
t.xml:41: element ul: validity error : Element ul content does not follow the DTD, expecting (li)+, got ()
            </ul>

i guess $secondary_links contains a link list where all elements have empty properties. there for is_array will always give true but phptemplate_wrap_links will return nothing.