multilingual support for footer message

Hi. Thank you for nice module.

My Drupal site is multilingual and I added multilingual support for footer message.
To declare 'footer_message_msg' as multilingual varible, I added the following file, footer_message.variable.inc :

/**
* @file
 * This module provides a configurable footer message as a block.
 */

/**
 * Implements hook_variable_info()
 */
function footer_message_variable_info($options) {
  $variables['footer_message_msg'] = array(
    'type' => 'string',
    'title' => t('Site footer', array(), $options),
    'default' => 'Drupal',
    'description' => t('The footer of this website.', array(), $options),
    'required' => FALSE,
  );

  return $variables;
}