Method update

LASzip/unused/rangemodel.cpp:243–251

update model */ sym symbol that occurred (must be <n from init) */

/* update model                                        */
/* sym  symbol that occurred (must be <n from init)    */
void RangeModel::update(U32 sym)
{
  if (left <= 0)
  {
    dorescale();
  }
  left--;
  newf[sym] += incr;
}