[boost] [fusion.adapted.std_tuple] bug

Looks like 2 files share the same include guard macro definitions. This makes it very hard to use Boost.Fusion for std::tuple's, especially if both boost::tuple and std::tuple need to be adapted. mbpro:fusion huil$ find . -type f |xargs grep -w BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726 ./adapted/boost_tuple/detail/category_of_impl.hpp:#if !defined(BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726) ./adapted/boost_tuple/detail/category_of_impl.hpp:#define BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726 ./adapted/std_tuple/detail/category_of_impl.hpp:#if !defined(BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726) ./adapted/std_tuple/detail/category_of_impl.hpp:#define BOOST_FUSION_CATEGORY_OF_IMPL_09272006_0726