Stats only update once

Problem

After you have installed and configured the module, cron queries the different social networks asking for the times that a node has been shared.

But after the first time a node get queued for the update of this information, it would remain in this state, even after the social networks are consulted.

If you check at the social_stats_total table, you can see it has not benn updated. total_virality is empty, changed is NULL and queued 1.

This makes that at the next run of cron, the node will not be queued again for a new query.

Watching at the code, I have seen that the queued value is set to 0 (zero) again, only for the first item in the queue, and only if it has some shares in any of the social networks.

  if (empty($batch['unfetched_services'])) {
    $item = reset($batch['items']);
    if ($item->social_stats != NULL) {
      $count_total = array_sum($item->social_stats);
      db_merge('social_stats_total')
        ->key(array('nid' => $item->nid))
        ->fields(array(
          'total_virality' => $count_total,
          'changed' => REQUEST_TIME,
          'queued' => 0,
        ))  
        ->execute();
    }   
  }

The rest of the nodes are leaved as queued, but there is no item in Drupal's queue that updates its information.

Proposed resolution

I think the best option, without changing the current logic of the function _social_stats_update, is to restore the queued value to zero after the execution of the callback function of every social network, right after the foreach that start at line 334.