Index: /OpenSceneGraph/branches/OpenSceneGraph-2.8/src/osgViewer/GraphicsWindowWin32.cpp
===================================================================
--- /OpenSceneGraph/branches/OpenSceneGraph-2.8/src/osgViewer/GraphicsWindowWin32.cpp (revision 9825)
+++ /OpenSceneGraph/branches/OpenSceneGraph-2.8/src/osgViewer/GraphicsWindowWin32.cpp (revision 10148)
@@ -1783,5 +1783,5 @@
 {
     if (!_realized) return;
-    if (!::SwapBuffers(_hdc))
+    if (!::SwapBuffers(_hdc) && ::GetLastError() != 0)
     {
         reportErrorForScreen("GraphicsWindowWin32::swapBuffersImplementation() - Unable to swap display buffers", _traits->screenNum, ::GetLastError());