Markup string translation

Hi,

There is a missing translation in picture.admin.inc file, just regarding to css markup in admin_picture_settings function. I think should be (line 204):

      $form[$machine_name]['css'] = array(
        '#type' => 'item',
        '#markup' => t('Consider using the selector <code>span[data-picture-mapping="@machine_name"]</code> in your theme CSS.', array('@name' => $machine_name)),
      );