/*
 *  call-seq:
 *     pq.adjust -> self
 *  
 *  Sometimes you modify the top element in the priority queue so that its
 *  priority changes. When you do this you need to reorder the queue and you
 *  do this by calling the adjust method.
 */
static VALUE
frt_pq_adjust(VALUE self)
{
    PriQ *pq;
    GET_PQ(pq, self);
    pq_down(pq);
    return self;
}