Missing closing li tag in taxonomy term block lists

There is a missing closing li tag in taxonomy term block lists. The last li in a list is never closed unless it is part of a sub-list ($lastdepth > 0).

This can be fixed by changing line 107 (and inserting another 2 lines):

  } else {
    $output .= "</li>";
  }

This fix can be seen in action at http://www.apaddedcell.com (see menu on the right sidebar).