issue #471: add debugging message to trash related methods

Author: dmitriim

classes/local/store/object_file_system.php

@@ -1009,6 +1009,7 @@ public function cron() {
      * @return string The full path to the trash directory
      */
     protected function get_trash_fulldir_from_hash($contenthash) {
+        debugging('Objectfs does not implement a trashdir.');
         return '';
     }
 
@@ -1019,6 +1020,7 @@ protected function get_trash_fulldir_from_hash($contenthash) {
      * @return string The full path to the trash file
      */
     protected function get_trash_fullpath_from_hash($contenthash) {
+        debugging('Objectfs does not implement a trashdir.');
         return '';
     }
 }