bug 2917 fixed: invalidate user cache each time pwg.images.delete is called,

to avoid blocking errors on gallery side if deleted photo is set as album
thumbnail.


git-svn-id: http://piwigo.org/svn/branches/2.5@23059 68402e56-0260-453c-a942-63ccdbb3a9ee

include/ws_functions.inc.php

@@ -2697,6 +2697,7 @@ function ws_images_delete($params, &$service)
 
   include_once(PHPWG_ROOT_PATH.'admin/include/functions.php');
   delete_elements($image_ids, true);
+  invalidate_user_cache();
 }
 
 function ws_add_image_category_relations($image_id, $categories_string, $replace_mode=false)