Utility function to rehash subqueues

Please add to nodequeue_generate if deemed useful. This runs at the end of our data migrations since we create new terms each time we migrate

/**
 * Rebuild all smartqueue_taxonomy queues. Useful after a data migration has wiped your terms.
 * When more smartqueue modules arrive, revisit this function.
 * 
 * @param vids
 *   An array of vocabulary ids.
 **/
function nodequeue_generate_rehash($vids) {
  // Delete existing smartqueue taxonomy subqueues
  db_query("DELETE ns FROM nodequeue_subqueue ns INNER JOIN nodequeue_queue nq ON ns.qid=nq.qid WHERE nq.owner = 'smartqueue_taxonomy'");
  
  // Re-add those subqueues
  $node = new stdClass;
  $tree = array();
  foreach ($vids as $vid) {
    $tree += taxonomy_get_tree($vid);
  }
  $node->taxonomy = $tree;
  $queues = nodequeue_load_queues(nodequeue_get_all_qids(200));
  foreach ($queues as $queue) {    
    if ($queue->owner == 'smartqueue_taxonomy') {
      nodequeue_api_subqueues(&$queue, $node);
    }
  }
}