ENH: Updated SpatialObject wrapping to support CONST_POINTER

Author: aylward

Modules/Core/SpatialObjects/wrapping/itkSpatialObjectBase.wrap

@@ -1,7 +1,7 @@
 itk_wrap_include("itkSpatialObject.h")
 itk_wrap_simple_class("itk::MetaEvent")
 
-itk_wrap_class("itk::SpatialObject" POINTER_WITH_EXPLICIT_SPECIALIZATION)
+itk_wrap_class("itk::SpatialObject" POINTER_WITH_CONST_POINTER)
   foreach(d ${ITK_WRAP_IMAGE_DIMS})
     itk_wrap_template("${d}" "${d}")
   endforeach()