Crash in InScanArea where Point pd is NULL

[padmalcom]

Hi, just experienced an error in the function InScanArea. Debugger says *pd * is NULL.

bool InScanArea(Point& pa, Point& pb, Point& pc, Point& pd)
{
  double oadb = (pa.x - pb.x)*(pd.y - pb.y) - (pd.x - pb.x)*(pa.y - pb.y);
  if (oadb >= -EPSILON) {
    return false;
  }

  double oadc = (pa.x - pc.x)*(pd.y - pc.y) - (pd.x - pc.x)*(pa.y - pc.y);
  if (oadc <= EPSILON) {
    return false;
  }
  return true;
}