[C++-sig] class/struct def_visitor

[Nikolay Mladenov]

I just updated from the boost-consulting cvs and I got the following
error:

D:\Shared\boost_1_31_0\boost\boost/python/class.hpp(62) : warning C4099:
'def_visitor' : type name first seen using 'class' now seen using
'struct'
        D:\Shared\boost_1_31_0\boost\boost/python/def_visitor.hpp(83) :
see declaration of 'def_visitor'