Copy the DIRECTION in vtkImageIterateFilter

This is the base of the FFT filters, vtkImageCityBlockDistance,
vtkEuclideanDistance, and vtkImageSeparableConvolution.  Copying
the DIRECTION to the output here is necessary for these filters to
be able to operate correctly on oriented images.

Imaging/Core/vtkImageIterateFilter.cxx

@@ -79,6 +79,7 @@ int vtkImageIterateFilter ::RequestInformation(vtkInformation* vtkNotUsed(reques
     out->CopyEntry(in, vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT());
 
     out->CopyEntry(in, vtkDataObject::ORIGIN());
+    out->CopyEntry(in, vtkDataObject::DIRECTION());
     out->CopyEntry(in, vtkDataObject::SPACING());
 
     vtkInformation* scalarInfo = vtkDataObject::GetActiveFieldInformation(