ptvcursor_free_subtree_levels(ptvcursor_t *ptvc)
{
	ptvc->pushed_tree       = NULL;
	ptvc->pushed_tree_max   = 0;
	DISSECTOR_ASSERT(ptvc->pushed_tree_index == 0);
	ptvc->pushed_tree_index = 0;
}
ptvcursor_free_subtree_levels(ptvcursor_t *ptvc)
{
	ptvc->pushed_tree       = NULL;
	ptvc->pushed_tree_max   = 0;
	DISSECTOR_ASSERT(ptvc->pushed_tree_index == 0);
	ptvc->pushed_tree_index = 0;
}