COMP: Suppress warnings from ITK on unary minus applied to unsigned
COMP: Suppress warnings from ITK on unary minus applied to unsigned

KitwareMedical/ITKTubeTK,aylward/ITKTubeTK,KitwareMedical/TubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/ITKTubeTK,thewtex/TubeTK,thewtex/TubeTK,KitwareMedical/TubeTK,KitwareMedical/TubeTK,KitwareMedical/TubeTK,aylward/ITKTubeTK,aylward/ITKTubeTK,KitwareMedical/ITKTubeTK,thewtex/TubeTK,aylward/ITKTubeTK,thewtex/TubeTK