Deleting an entity without a path causes an undefined index error on line 809

I believe the bug also exists in 7.x-1.x-dev but I haven't tested it. The code in this function is the same in both the beta and dev version. When I delete an entity that does not have a path, redirect_delete_by_path($uri['path']); generates an error. I was able to make the error disappear by changing

if ($uri = entity_uri($entity_type, $entity)) {
  redirect_delete_by_path($uri['path']);
}

to the following:

if ($uri = entity_uri($entity_type, $entity)) {
  if (isset($uri['path'])) {
    redirect_delete_by_path($uri['path']);
  }
}