image cache menu router with an external file directory path

Hi, I have the following case : the "files" directory is outside of my drupal installation.
in this case the function file_directory_path() return something like "/mydir".

so the menu_router item of imagecache can never be called because all path received by drupal won't begin with a '/'

I suggest the following fix in imagecache.module :

replace

  $items[file_directory_path().'/imagecache'] = array(
    'page callback' => 'imagecache_cache',
    'access callback' => TRUE,
    'type' => MENU_CALLBACK
  );

with

  $image_cache_router_path = file_directory_path().'/imagecache'; 
 //we check if the path is an absolute path (ie outside of the drupal base directory)
  $external_file_system = (strpos(file_directory_path(), '/') === 0);
  
  if($external_file_system){
   $image_cache_router_path = substr(file_directory_path(),1, strlen(file_directory_path())) .'/imagecache';
  }
 
  $items[$image_cache_router_path] = array(
    'page callback' => 'imagecache_cache',
    'access callback' => TRUE,
    'type' => MENU_CALLBACK
  );

Regards,

David