Sean McBride

itkNarrowBandImageFilterBaseTest read/write race with GetPixel() / SetPixel()

1

Running the itkNarrowBandImageFilterBaseTest test with TSan: ``` WARNING: ThreadSanitizer: data race (pid=71194) Read of size 4 at 0x000102c13fac by thread T13: #0 itk::NarrowBandImageFilterBase::ThreadedApplyUpdate(double const&, itk::NarrowBandImageFilterBase::ThreadRegionType const&, unsigned int) itkNarrowBandImageFilterBase.hxx:234 (ITKNarrowBandTestDriver:arm64+0x10004307c)...