Empty categories

<?php
  // Display a list of categories with zero nodes associated with them.
  // This code once appeared inside a node. Now I use a view. Publishing it for posterity.
  $results = db_query(db_rewrite_sql('SELECT t.* FROM {term_data} t WHERE t.vid = %d ORDER BY weight, name', 't', 'tid'), 1);
    while ($term = db_fetch_object($results)) {
      if (taxonomy_term_count_nodes($term->tid) == 0) {
      $rows[] = array(
        l($term->name, "taxonomy/term/$term->tid"),
        l(t('edit'), "admin/content/taxonomy/edit/term/$term->tid", array(), $destination),
      );
    }
  }

  $output .= theme('table', $header, $rows, array('id' => 'taxonomy'));
  if ($vocabulary->tags || $total_entries >= $page_increment) {
    $output .= theme('pager', NULL, $page_increment);
  }
  print count($rows);
  print $output; 
?>