update.compare.inc in Drupal 6.16 contains functions that are not available to PHP 4

Line 695 in ./modules/update/update.compare.inc contains the PHP function array_intersect_key, which is a PHP 5-only function. Drupal 6.16 is supposed to be PHP 4 compatible. Upon updating to 6.16, an error will be produced when visiting any administration page:

Fatal error: Call to undefined function: array_intersect_key() in /var/www/htdocs/modules/update/update.compare.inc on line 695

Here is the original version of that function:

<?php
function update_filter_project_info($info) {
  $whitelist = array(
    '_info_file_ctime',
    'datestamp',
    'major',
    'name',
    'package',
    'project',
    'project status url',
    'version',
  );
  return array_intersect_key($info, drupal_map_assoc($whitelist));
}
?>

Here is the proposed patch code. It reproduces the same functionality as that function:

<?php
function update_filter_project_info($info) {
  $whitelist = array(
    '_info_file_ctime',
    'datestamp',
    'major',
    'name',
    'package',
    'project',
    'project status url',
    'version', 
  );

  $drupal_wl = drupal_map_assoc($whitelist);
  $intersects = array();
  foreach ($info as $key => $value) {
    if(array_key_exists($key, $drupal_wl)) {
      $intersects[$key] = $value;
    }
  }

  return $intersects;
}
?>

Attached is a patch file to correct the code.