[boost] Support for disabled RTTI

Would it be useful (or correct) to add the following to config/compiler/visualc.hpp: // // check for RTTI support: #ifndef _CPPRTTI # define BOOST_NO_TYPEID #endif (eg around line 106, after the test for exceptions) ? I'm using MSVC 7.1 (SP1) with STLport 5.1.5 (latest) - With the new Boost.Exception I get a drizzle of C4541 warnings. I don't want to force BOOST_NO_TYPEID in config/user.hpp because some projects do have RTTI. re