From 2fdcefac05414ce452f0ad7ff428d87e2ea67097 Mon Sep 17 00:00:00 2001
From: Anthony Williams <anthony.ajw@gmail.com>
Date: Thu, 10 Jun 2010 07:38:23 +0000
Subject: [PATCH] Added static cast in move of upgrade_lock to work with MSVC10
 and g++4.5

[SVN r62717]
---
 include/boost/thread/locks.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/thread/locks.hpp b/include/boost/thread/locks.hpp
index 7c0b6409..7cc1d6b4 100644
--- a/include/boost/thread/locks.hpp
+++ b/include/boost/thread/locks.hpp
@@ -489,7 +489,7 @@ namespace boost
     template<typename Mutex>
     inline upgrade_lock<Mutex>&& move(upgrade_lock<Mutex>&& ul)
     {
-        return ul;
+        return static_cast<upgrade_lock<Mutex>&&>(ul);
     }
 #endif
     template<typename Mutex>