drupal_redirect_form need fix

If I login and redirect to same page, it remove the destination.

Drupal 6.11 Line 625

  if (!isset($goto) || ($goto !== FALSE)) {
    if (isset($goto)) {
      // Remove any fake destination set by drupal_not_found() or
      // drupal_access_denied() so that we can properly redirect from those
      // pages.
      if (isset($_REQUEST['destination']) && $_REQUEST['destination'] == $_GET['q']) {
        unset($_REQUEST['destination']);
      }
      if (is_array($goto)) {
        call_user_func_array('drupal_goto', $goto);
      }
      else {
        drupal_goto($goto);
      }
    }