added a fix for compilers without PTS

[SVN r23955]

minmax/test/minmax_element_test.cpp

@@ -1,3 +1,4 @@
+#include <boost/config.hpp> /* prevents some nasty warns in MSVC */
 #include <utility>
 #include <functional>
 #include <algorithm>
@@ -34,6 +35,8 @@ std::ostream& operator<<(std::ostream& str, custom const& x)
     return str;
 }
 
+BOOST_BROKEN_COMPILER_TYPE_TRAITS_SPECIALIZATION(custom)
+
 namespace std {
 
 template <>