/** insert given item as open node (into m_open and m_open_queue) */
inline void InsertOpenNode(Titem_& item)
{
assert(m_closed.Find(item.GetKey()) == NULL);
m_open.Push(item);
m_open_queue.Include(&item);
if (&item == m_new_node) {
m_new_node = NULL;
}
}
