Cannot use object of type stdClass as array in modules/weblinks/weblinks.module on line 1199

When attempting to edit a taxonomy term on a migrated Drupal 6.20 site this error is thrown:

Fatal error: Cannot use object of type stdClass as array in /var/www/html/cm7/sites/all/modules/weblinks/weblinks.module on line 1199

What needs to be changed to fix this statement?

      // Is this for our vocabulary?
      if ($form['#vocabulary']['vid'] != _weblinks_get_vocid()) {
        return '';
      }