Fix for query_methods like useXxxQuery() in sfWidgetFormPropelChoice

So this query could work:

```php
new sfWidgetFormPropelChoice(array(
        'model' => 'EstateAddress',
        'query_methods' => array(
          'setFormatter' => array(ModelCriteria::FORMAT_ON_DEMAND),
          'useStreetQuery' => array(null, Criteria::LEFT_JOIN),
          'orderByName',
          'endUse',
          'with' => array('Street'),
        ),
      ));
```