COMP: Add missing header to itkStructureTensorImageFilter.hxx
COMP: Add missing header to itkStructureTensorImageFilter.hxx

InsightSoftwareConsortium/ITKAnisotropicDiffusionLBR,InsightSoftwareConsortium/ITKAnisotropicDiffusionLBR,InsightSoftwareConsortium/ITKAnisotropicDiffusionLBR