Comment 2 for bug 758567

StacktraceTop:
 vtkDataArrayTemplate<double>::GetTuple (this=<value optimized out>, i=<value optimized out>, tuple=0x7fff5df48d30) at /build/buildd/vtk-5.4.2/Common/vtkDataArrayTemplate.txx:612
 GetPoint (p=0x52f33e0, numPts=0, pts=0x8629e38, n=0x7fff5df48e50) at /build/buildd/vtk-5.4.2/Common/vtkPoints.h:119
 vtkPolygon::ComputeNormal (p=0x52f33e0, numPts=0, pts=0x8629e38, n=0x7fff5df48e50) at /build/buildd/vtk-5.4.2/Filtering/vtkPolygon.cxx:103
 vtkPolyDataNormals::RequestData (this=0x850e8c0, inputVector=<value optimized out>, outputVector=<value optimized out>) at /build/buildd/vtk-5.4.2/Graphics/vtkPolyDataNormals.cxx:331
 vtkExecutive::CallAlgorithm (this=0x85fbc10, request=0x84f31c0, direction=<value optimized out>, inInfo=0x8745da0, outInfo=0x86a5d70) at /build/buildd/vtk-5.4.2/Filtering/vtkExecutive.cxx:748