Fix msvc and gcc warnings in the type_traits library.

Build should now be clean with cl /W4 or gcc -Wall -Wextra -pedantic for all except one test - there appears to be no way to use initialized aligned_storage with gcc without it producing a warning :-(

[SVN r57489]

test/is_abstract_test.cpp

@@ -13,6 +13,10 @@
 #  include <boost/type_traits/is_abstract.hpp>
 #endif
 
+#ifdef BOOST_MSVC
+#pragma warning(disable: 4505)
+#endif
+
 
 struct TestA {};
 struct TestB { virtual void foo(void) = 0; };

test/test.hpp

@@ -407,6 +407,10 @@ struct wrap
 {
    T t;
    int j;
+protected:
+   wrap();
+   wrap(const wrap&);
+   wrap& operator=(const wrap&);
 };