/*
 *  call-seq:
 *     pq.size -> integer
 *  
 *  Returns the size of the queue, ie. the number of elements currently stored
 *  in the queue. The _size_ of a PriorityQueue can never be greater than
 *  its _capacity_
 */
static VALUE
frt_pq_size(VALUE self)
{
    PriQ *pq;
    GET_PQ(pq, self);
    return INT2FIX(pq->size);
}