Added support for X11's overrideRedirect functionality

src/osgPlugins/cfg/ReaderWriterCFG.cpp

@@ -84,6 +84,8 @@ static osg::GraphicsContext::Traits* buildTrait(RenderSurface& rs)
     traits->sharedContext = 0;
     traits->pbuffer = (rs.getDrawableType()==osgProducer::RenderSurface::DrawableType_PBuffer);
 
+    traits->overrideRedirect = rs.usesOverrideRedirect();
+
     return traits;
  }
 

src/osgViewer/GraphicsWindowX11.cpp

@@ -655,11 +655,12 @@ bool GraphicsWindowX11::createWindow()
     swatt.event_mask =  0;
     unsigned long mask = CWBackPixel | CWBorderPixel | CWEventMask | CWColormap;
 
-    bool overrideRedirect = false;
-    if (overrideRedirect)
+    if (_traits->overrideRedirect)
     {
         swatt.override_redirect = true;
         mask |= CWOverrideRedirect;
+        
+        osg::notify(osg::NOTICE)<<"Setting override redirect"<<std::endl;
     }
 
     _window = XCreateWindow( _display, _parent,