Fixes for GCC 3.0.3 build.

include/osgUtil/RenderLeaf

@@ -51,7 +51,7 @@ class OSGUTIL_EXPORT RenderLeaf : public osg::Referenced
         virtual void render(osg::State& state,RenderLeaf* previous);
         
         /// allow RenderGraph to change the RenderLeaf's _parent.
-        friend RenderGraph;
+        friend class osgUtil::RenderGraph;
 
     public:
     

include/osgUtil/Tesselator

@@ -98,7 +98,7 @@ class OSGUTIL_EXPORT Tesselator
 
 	protected:
     
-        friend VertexIndexSet;
+        friend struct VertexIndexSet;
 
         typedef std::vector<VertexIndexSet>  CoordVec;