Wrong declaration of $term_fields in preprocess-node.inc

The variable $term_fields is declared on the wrong line in preprocess-node.inc, resulting in a notice if no terms are present.

Wrong:

foreach ($vars['content'] AS $item) {
  if (isset($item['#field_type'])) {
    <b>$term_fields = '';</b>
    if ($item['#field_type'] == 'taxonomy_term_reference') {
      //krumo($item);
      $field_name = $item['#field_name'];
      // $term_fields will hold the HTML data from any term_reference field, and be rendered separately in node.tpl.php
      $term_fields .= render($item);
      // hide this "term" element from rendering in $content
      hide($vars['content'][$field_name]);
    }
  }
}

Correct:

<b>$term_fields = '';</b>
foreach ($vars['content'] AS $item) {
  if (isset($item['#field_type'])) {
    if ($item['#field_type'] == 'taxonomy_term_reference') {
      //krumo($item);
      $field_name = $item['#field_name'];
      // $term_fields will hold the HTML data from any term_reference field, and be rendered separately in node.tpl.php
      $term_fields .= render($item);
      // hide this "term" element from rendering in $content
      hide($vars['content'][$field_name]);
    }
  }
}