From e1c5969b0e19c59440ef7e52b7985a0aef334aac Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Thu, 7 May 2009 13:18:35 +0000
Subject: [PATCH] From Chris Denham, fix for swapBuffers warning when window is
 minimized under Windows.

  svn merge -r 10146:10147 http://www.openscenegraph.org/svn/osg/OpenSceneGraph/trunk/src/osgViewer/
---
 src/osgViewer/GraphicsWindowWin32.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/osgViewer/GraphicsWindowWin32.cpp b/src/osgViewer/GraphicsWindowWin32.cpp
index 525b69036..6a48bf70c 100644
--- a/src/osgViewer/GraphicsWindowWin32.cpp
+++ b/src/osgViewer/GraphicsWindowWin32.cpp
@@ -1782,7 +1782,7 @@ void GraphicsWindowWin32::closeImplementation()
 void GraphicsWindowWin32::swapBuffersImplementation()
 {
     if (!_realized) return;
-    if (!::SwapBuffers(_hdc))
+    if (!::SwapBuffers(_hdc) && ::GetLastError() != 0)
     {
         reportErrorForScreen("GraphicsWindowWin32::swapBuffersImplementation() - Unable to swap display buffers", _traits->screenNum, ::GetLastError());
     }