LI custom class not added in theme_links

Code in theme.inc appears to want to set any custom class attributes to both the link and the LI. However, the custom attributes are not added to the LI. If this is expected behaviour, the $class variable can be removed. Sorry I don't have a proper patch file, but I'm not set up on my current box. . .

function theme_links (theme.inc:537)

      // Automatically add a class to each link and also to each LI
      if (isset($link['attributes']) && isset($link['attributes']['class'])) {
        $link['attributes']['class'] .= ' ' . $key;
        $class = $key;
      }
      else {
        $link['attributes']['class'] = $key;
        $class = $key;
      }

should read:

      // Automatically add a class to each link and also to each LI
      if (isset($link['attributes']) && isset($link['attributes']['class'])) {
        $link['attributes']['class'] .= ' ' . $key;
        $class = $link['attributes']['class'];
      }
      else {
        $link['attributes']['class'] = $key;
        $class = $key;
      }