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/CompositeViewer.cpp

@@ -639,14 +639,15 @@ void CompositeViewer::realize()
     }
 
 
-    startThreading();
-
     // initialize the global timer to be relative to the current time.
     osg::Timer::instance()->setStartTick();
 
     // pass on the start tick to all the associated eventqueues
     setStartTick(osg::Timer::instance()->getStartTick());
 
+    // configure threading.
+    setUpThreading();
+
     if (osg::DisplaySettings::instance()->getCompileContextsHint())
     {
         int numProcessors = OpenThreads::GetNumberOfProcessors();