[boost] BOOST_PP_STRINGIZE with MSVC 7.1 broken in 1.33.0 library version

Test code: #define AAA const char bbb[] = BOOST_PP_STRINGIZE(prefix BOOST_PP_COMMA() postfix) AAA; Preprocessing of such a code is accompanied by warning C4002: too many actual parameters for macro 'BOOST_PP_STRINGIZE_I'. With 1.32.0 library version variable bbb value was "prefix, postfix". With new version it is just "prefix".