Disable OSG 3.5.5 thread affinity setting in the scenewidget due to the interference with QT threads

Reference: http://forum.openscenegraph.org/viewtopic.php?t=16158

apps/opencs/view/render/scenewidget.cpp

@@ -10,6 +10,7 @@
 #include <osgViewer/CompositeViewer>
 #include <osgViewer/ViewerEventHandlers>
 #include <osg/LightModel>
+#include <osg/Version>
 
 #include <components/resource/scenemanager.hpp>
 #include <components/resource/resourcesystem.hpp>
@@ -130,6 +131,10 @@ CompositeViewer::CompositeViewer()
 
     setThreadingModel(threadingModel);
 
+#if OSG_VERSION_GREATER_OR_EQUAL(3,5,5)
+    setUseConfigureAffinity(false);
+#endif
+
     // disable the default setting of viewer.done() by pressing Escape.
     setKeyEventSetsDone(0);