ENH: itk::NumericTraits::Zero itk::NumericTraits::One were deprecated in 2012; just before the ITK 4.2 release. ZeroValue() and OneValue() should be used instead.

git-svn-id: https://svn.bigr.nl/elastix/trunkpublic@4855 4d348492-3962-11de-aa85-65a2020054a3