Converted the instance of osgNew and osgDelete back to new and delete as part

of depecating the include/osg/MemoryManager

src/osg/ClearNode.cpp

@@ -11,7 +11,7 @@ ClearNode::ClearNode():
     _requiresClear(true),
     _clearColor(0.0f,0.0f,0.0f,1.0f)
 {
-    StateSet* stateset = osgNew StateSet;
+    StateSet* stateset = new StateSet;
     stateset->setRenderBinDetails(-1,"RenderBin");
     setStateSet(stateset);
 }