/* Initializes |trav| for use with |tree|
   and selects the null node. */
void
bst_t_init (struct bst_traverser *trav, struct bst_table *tree)
{
  trav->bst_table = tree;
  trav->bst_node = NULL;
  trav->bst_height = 0;
  trav->bst_generation = tree->bst_generation;
}

