Run most of the unordered container tests (not the exception tests) on warning

level 4 on Visual C++.


[SVN r38648]

test/objects/minimal.hpp

@@ -8,6 +8,11 @@
 
 #include <cstddef>
 
+#if defined(BOOST_MSVC)
+#pragma warning(push)
+#pragma warning(disable:4100) // unreferenced formal parameter
+#endif
+
 namespace test
 {
 namespace minimal
@@ -226,4 +231,8 @@ namespace minimal
 }
 }
 
+#if defined(BOOST_MSVC)
+#pragma warning(pop)
+#endif
+
 #endif