Unordered/hash: Avoid a gcc warning. Refs #6771

[SVN r77832]

test/helpers/postfix.hpp

@@ -0,0 +1,10 @@
+
+// Copyright 2012 Daniel James.
+// 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)
+
+// Include this after the boost headers, but before other test headers.
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic ignored "-Wfloat-equal"
+#endif