Simplified type_info support due to improvements in boost/detail/sp_typeinfo.hpp. A few tweaks to better deal with warnings.

[SVN r58132]

include/boost/exception/to_string.hpp

@@ -5,10 +5,12 @@
 
 #ifndef UUID_7E48761AD92811DC9011477D56D89593
 #define UUID_7E48761AD92811DC9011477D56D89593
-
 #if defined(__GNUC__) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
 #pragma GCC system_header
 #endif
+#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
+#pragma warning(push,1)
+#endif
 
 #include <boost/utility/enable_if.hpp>
 #include <boost/exception/detail/is_output_streamable.hpp>
@@ -75,4 +77,7 @@ boost
         }
     }
 
+#if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
+#pragma warning(pop)
+#endif
 #endif