Standardize the call to setUpThreading() in CompositeViewer/Viewer::realize().

Standardize the call to scene->resizeGLObjects().


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/branches/OpenSceneGraph-3.4@14945 16af8721-9629-0410-8352-f15c8da7e697

src/osgViewer/Viewer.cpp

@@ -587,6 +587,7 @@ void Viewer::realize()
     // pass on the start tick to all the associated event queues
     setStartTick(osg::Timer::instance()->getStartTick());
 
+    // configure threading.
     setUpThreading();
 
     if (osg::DisplaySettings::instance()->getCompileContextsHint())