ENH: add wrapping to compile with unsigned short
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

SimonRit/RTK,SimonRit/RTK,SimonRit/RTK,SimonRit/RTK