sfGuardPlugin Data-Dump & Data-Load UserPassword error solution

Please rewrite signin function from sfGuardPlugin/lib/model/plugin/PluginsfGuardUser.php as following:

(For Propel)

public function setPassword($password)
  {
    if (!$password && 0 == strlen($password))
    {
      return;
    }
/*
 * iba: if salt is set then probly the passwort is already encrpted
 * thus call setPassword without user_funx algorythm
 */
    /*--- Add Here ---*/
    $fromdump = false;
    if($this->isNew() && $this->getSalt()){
      $fromdump=true;
    }
    /*----------------*/

    if (!$salt = $this->getSalt())
    {
      $salt = md5(rand(100000, 999999).$this->getUsername());
      $this->setSalt($salt);
    }
    $algorithm = sfConfig::get('app_sf_guard_plugin_algorithm_callable', 'sha1');
    $algorithmAsStr = is_array($algorithm) ? $algorithm[0].'::'.$algorithm[1] : $algorithm;
    if (!is_callable($algorithm))
    {
      throw new sfException(sprintf('The algorithm callable "%s" is not callable.', $algorithmAsStr));
    }
    $this->setAlgorithm($algorithmAsStr);

/*
 * iba: if passwort is already encrypted dont encrypt it again.
 */
    /*--- Add Here ---*/
    if($fromdump){
      parent::setPassword($password);
    }
    /*----------------*/

    else{
      parent::setPassword(call_user_func_array($algorithm, array($salt.$password)));
    }   
    
  }