set/map fixes

[SVN r24912]

preprocessed/list/list20.cpp

@@ -1,2 +1,16 @@
+
+// Copyright Aleksey Gurtovoy 2002-4004
+//
+// Distributed under the Boost Software License, Version 1.0. 
+// (See accompanying file LICENSE_1_0.txt or copy at 
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/mpl for documentation.
+
+// $Source$
+// $Date$
+// $Revision$
+
 #define BOOST_MPL_PREPROCESSING_MODE
+#include <boost/config.hpp>
 #include <boost/mpl/list/list20.hpp>