itk_wrap_module(ITKImageFunction)
itk_auto_load_submodules()
itk_end_wrap_module()

itk_wrap_module(ITKImageFunction)
set(WRAPPER_LIBRARY_GROUPS
  itkImageFunctionBase
)
itk_auto_load_submodules()
itk_end_wrap_module()

Fix warning for InterpolateImageFunction wrapping
COMP: Fix warning for InterpolateImageFunction wrapping

On the Linux-x86_64-gcc4.8-WrapITK dashboard computer, we get a lot of
errors like this one:

Nothing known about base class 'itk::ImageFunction< itk::Image< itk::RGBAPixel< unsigned short >,2u >,itk::RGBAPixel< double >,double >'. Ignored.

I do not get this error locally and other dashboard computers are happy.
This patch is an attempt to fix this by first wrapping the base class.

Change-Id: I47416bfaf0521d0e69a01004184dff4f94ac16b4
