From be3077e2036f90f0c550659cdf4352ae3768c1e8 Mon Sep 17 00:00:00 2001
From: John Maddock <john@johnmaddock.co.uk>
Date: Tue, 1 Sep 2009 12:24:08 +0000
Subject: [PATCH] Fix warnings emitted by gcc when building with -Wall -Wextra.
 Fixes #3381.

[SVN r55957]
---
 include/boost/type_traits/is_signed.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/type_traits/is_signed.hpp b/include/boost/type_traits/is_signed.hpp
index 73389a1..e06b47c 100644
--- a/include/boost/type_traits/is_signed.hpp
+++ b/include/boost/type_traits/is_signed.hpp
@@ -30,7 +30,7 @@ template <class T>
 struct is_signed_helper
 {
    typedef typename remove_cv<T>::type no_cv_t;
-   BOOST_STATIC_CONSTANT(bool, value = (static_cast<no_cv_t>(-1) < 0));
+   BOOST_STATIC_CONSTANT(bool, value = (!(static_cast<no_cv_t>(-1) > 0)));
 };
 
 template <bool integral_type>