[vtkusers] VTK on OSX with Python 2.3

[Yves Starreveld]

> OSX'ers:
>
> I have committed the changes required for the above build to CVS.
> It has been verified to work with older versions of CMake and Python.
> Those interested can find details on the changes at:
> http://public.kitware.com/cgi-bin/cvsweb.cgi/VTK/Common/
> CMakeLists.txt?cvsroot=VTK
>
> Now on to that wheel-mouse thing!
>

> Yves
>