Iterator for empty list field contains an empty item

Just found this and the issue that introduced it #859466: Error when iterating over EntityListWrapper properties without data.

    foreach ($this->wrapper()->foo->getIterator() as $data) {
      $values[] = $data->value()->name;
     }

$data-value() will throw an exception since the item is empty - so you have to count() the field or similar prior to the foreach().

I'd expect to just get an empty iterator here instead so the foreach is a no-op.