Bug when going back to node path alias

Hi,

I had redirect loops problems, so I added this implementation of hook_node_presave in a module.
This hook simply look for a redirection with source is equal to the new path alias of the node, and delete this redirection.
This way, I avoid now the problem of redirection loops when changing my alias to a previously existing alias (meaning existing as a redirection) :

/**
 * Implements hook_node_update().
 * When saving the path alias, delete any redirection from that path to avoid infinite loops.
 */
function redirect_node_update($node) {
  $redirect_list = redirect_load_multiple(FALSE, array('redirect' => $node->path['source']));
  foreach ($redirect_list as $rid => $redirect_item){
    if ($redirect_item->source == $node->path['alias']){
      redirect_delete($rid);
    }
  }
}