Added Object::resizeGLObjectBuffers(uint) method to help improve the ability

to change the number of active graphics contexts on the fly during an applications
life.

include/osg/StateSet

@@ -417,6 +417,9 @@ class OSG_EXPORT StateSet : public Object
         /** call compile on all StateAttributes contained within this StateSet.*/
         void compileGLObjects(State& state) const;
 
+        /** Resize any per context GLObject buffers to specified size. */
+        virtual void resizeGLObjectBuffers(unsigned int maxSize);
+
         /** call release on all StateAttributes contained within this StateSet.*/
         virtual void releaseGLObjects(State* state=0) const;