if (!empty($comment->cid) && !isset($comment->original)) {
      $comment->original = entity_load_unchanged('comment', $comment->cid);
      // If a term id was given, but no entity was loaded, create a new stub term
      // to update later.
      if (!$comment->original) {
        $cid = db_insert('comment')
          ->fields(array(
            'cid' => $comment->cid,
            'pid' => $comment->pid,
            'nid' => $comment->nid,
            'uid' => $comment->uid,
            'subject' => $comment->subject,
            'hostname' => $comment->hostname,
            'created' => $comment->created,
            'changed' => isset($comment->changed) ? $comment->changed : $comment->created,
            'status' => $comment->status,
            'thread' => $comment->thread,
            'language' => $comment->language,
          ))
          ->execute();
      }
    }