warrnings if node->changed time is empty,

Warrnings:
"date() expects parameter 2 to be long, string given .....token_node.inc, line 35 to 46".
and second problem.. when node->created is empty (when creating new node) path for uploaded files is empty too.
I think there should be if statment like this:
token_node.inc:
line 19:

if (empty($node->created)) {
    $node->created = time();
  }
      $values['yyyy']           = date('Y', $node->created);
      $values['yy']             = date('y', $node->created);
      $values['month']          = date('F', $node->created);
      $values['mon']            = date('M', $node->created);
      $values['mm']             = date('m', $node->created);
      $values['m']              = date('n', $node->created);
      $values['ww']             = date('W', $node->created);
      $values['date']           = date('N', $node->created);
      $values['day']            = date('l', $node->created);
      $values['ddd']            = date('D', $node->created);
      $values['dd']             = date('d', $node->created);
      $values['d']              = date('j', $node->created);
if (!(empty($node->changed))) {
      $values['mod-yyyy']       = date('Y', $node->changed);
      $values['mod-yy']         = date('y', $node->changed);
      $values['mod-month']      = date('F', $node->changed);
      $values['mod-mon']        = date('M', $node->changed);
      $values['mod-mm']         = date('m', $node->changed);
      $values['mod-m']          = date('n', $node->changed);
      $values['mod-ww']         = date('W', $node->changed);
      $values['mod-date']       = date('N', $node->changed);
      $values['mod-day']        = date('l', $node->changed);
      $values['mod-ddd']        = date('D', $node->changed);
      $values['mod-dd']         = date('d', $node->changed);
      $values['mod-d']          = date('j', $node->changed);
}