[vtkusers] Useless comupations in vtkMath

[al.gry]

Hi everyone,

I posted this thread last week but it wasn't accepted so Im trying again. 

I just looked into vtkMath source code provided via VTK.git and I found
things like this:

inline double vtkMath::Normalize(double x[3])
{
  double den;
  if ( ( den = vtkMath::Norm( x ) ) != 0.0 )
    {
    for (int i=0; i < 3; i++)
      {
      x[i] /= den;
      }
    }
  return den;
}

I guess the for-loop can be erased since it's useless... btw, if-instruction
doesn't do anything so it's also useless.

Regards, Al 

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