/*
 *  call-seq:
 *     bv.next -> bit_num
 *  
 *  Returns the next set bit in the bit vector scanning from low order to high
 *  order. You should call +#reset_scan+ before calling this method
 *  if you want to scan from the beginning. It is automatically reset when you
 *  first create the bit vector.
 */
VALUE
frt_bv_next(VALUE self)
{
    BitVector *bv;
    GET_BV(bv, self);
    return INT2FIX(bv_scan_next(bv));
}