content_fields(NULL,'MyContentType') return ALL fields, and NOT MyContentType fields

Hi Folks,
I don't know if this is a bug or a feature request ... anyway ...

I needed only the fields of a specific content type so , I call content_fields(NULL,'MyContentType'), but I get ALL the field of my drupal site ... not what I expected.
See the issue here about filefield paths module: http://drupal.org/node/606500

By modifiying the function content_fields this way:

function content_fields($field_name = NULL, $content_type_name = NULL) {
  $info = _content_type_info();
  if (isset($info['fields'])) {
    if (empty($field_name)) {
      if (!empty($content_type_name)) {
        // remove all the field in $info['fields'] not specific to this content_type_name - content_type_name MUST be in lower case
        foreach ($info['fields'] as $field ) {
          if ($field['type_name']!=$content_type_name) {
            unset($info['fields'][ $field['field_name'] ]);
          }
        }
      }
      return $info['fields'];
      
    }
    if (isset($info['fields'][$field_name])) {
      if (empty($content_type_name)) {
        return $info['fields'][$field_name];
      }
      if (isset($info['content types'][$content_type_name]['fields'][$field_name])) {
        return $info['content types'][$content_type_name]['fields'][$field_name];
      }
    }
  }
}

only the fields specifics to this content_type_name will be return.

Hope this help ....
Regards
PS: and thx for all your hard work at this module and cck in core what an achievement (or a begining !!!)