Bug in vtkDataSetReder

[John Biddiscombe]

in vtkDataSetReder GetOutput()

the filter does

  this->Execute();
  return (vtkDataSet *)this->Outputs[0];

but if it has a bad filename or a file read error then Outputs is not
defined and an access violation occurs.

  this->Execute();
  if (Outputs) {
  	return (vtkDataSet *)this->Outputs[0];
  } else return NULL;

might be better.

ta taa

John B




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