message: ENH: add wrapping to compile with unsigned short
  Works with the following options (last option was causing the issue)
  ITK_WRAP_IMAGE_DIMS:STRING=1;2;3;4
  ITK_WRAP_double:BOOL=ON
  ITK_WRAP_rgb_unsigned_char:BOOL=OFF
  ITK_WRAP_rgba_unsigned_char:BOOL=OFF
  ITK_WRAP_unsigned_char:BOOL=OFF
  ITK_WRAP_unsigned_short:BOOL=ON
diff: @@ -26,10 +26,12 @@ itk_wrap_class("itk::UnaryFunctorImageFilter" POINTER)
  foreach(i ${WRAP_ITK_INT})
  foreach(t ${WRAP_ITK_REAL})
  - itk_wrap_template("I${ITKM_${i}}3I${ITKM_${t}}3LUT${ITKM_${i}}${ITKM_${t}}"
  - "itk::Image<${ITKT_${i}}, 3>, itk::Image<${ITKT_${t}}, 3>, rtk::Functor::LUT< ${ITKT_${i}}, ${ITKT_${t}} >")
  itk_wrap_template("I${ITKM_${i}}2I${ITKM_${t}}2LUT${ITKM_${i}}${ITKM_${t}}"
  "itk::Image<${ITKT_${i}}, 2>, itk::Image<${ITKT_${t}}, 2>, rtk::Functor::LUT< ${ITKT_${i}}, ${ITKT_${t}} >")
  + itk_wrap_template("I${ITKM_${i}}3I${ITKM_${t}}3LUT${ITKM_${i}}${ITKM_${t}}"
  + "itk::Image<${ITKT_${i}}, 3>, itk::Image<${ITKT_${t}}, 3>, rtk::Functor::LUT< ${ITKT_${i}}, ${ITKT_${t}} >")
  + itk_wrap_template("I${ITKM_${i}}4I${ITKM_${t}}4LUT${ITKM_${i}}${ITKM_${t}}"
  + "itk::Image<${ITKT_${i}}, 4>, itk::Image<${ITKT_${t}}, 4>, rtk::Functor::LUT< ${ITKT_${i}}, ${ITKT_${t}} >")
  endforeach()
  endforeach()
  @@ -39,6 +41,8 @@ itk_wrap_class("itk::UnaryFunctorImageFilter" POINTER)
  "itk::Image<${ITKT_US}, 2>, itk::Image<${ITKT_F}, 2>, rtk::Functor::LUT< ${ITKT_US}, ${ITKT_F} >")
  itk_wrap_template("I${ITKM_US}3I${ITKM_F}3LUT${ITKM_US}${ITKM_F}"
  "itk::Image<${ITKT_US}, 3>, itk::Image<${ITKT_F}, 3>, rtk::Functor::LUT< ${ITKT_US}, ${ITKT_F} >")
  + itk_wrap_template("I${ITKM_US}4I${ITKM_F}4LUT${ITKM_US}${ITKM_F}"
  + "itk::Image<${ITKT_US}, 4>, itk::Image<${ITKT_F}, 4>, rtk::Functor::LUT< ${ITKT_US}, ${ITKT_F} >")
  endif()
  itk_end_wrap_class()
  @@ -54,6 +58,7 @@ itk_wrap_class("rtk::LookupTableImageFilter" POINTER)
  if (NOT ITK_WRAP_unsigned_short)
  itk_wrap_template("IUS2IF2" "itk::Image<${ITKT_US}, 2>, itk::Image<${ITKT_F}, 2>")
  itk_wrap_template("IUS3IF3" "itk::Image<${ITKT_US}, 3>, itk::Image<${ITKT_F}, 3>")
  + itk_wrap_template("IUS3IF3" "itk::Image<${ITKT_US}, 4>, itk::Image<${ITKT_F}, 4>")
  endif()
  itk_end_wrap_class()
  