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/buffered_value

@@ -48,6 +48,8 @@ class buffered_value
         inline bool empty() const { return _array.empty(); }
 
         inline unsigned int size() const { return _array.size(); }
+        
+        inline void resize(unsigned int newSize) { _array.resize(newSize,0); }
 
         inline T& operator[] (unsigned int pos)
         {
@@ -99,6 +101,8 @@ class buffered_object
 
         inline unsigned int size() const { return _array.size(); }
 
+        inline void resize(unsigned int newSize) { _array.resize(newSize); }
+
         inline T& operator[] (unsigned int pos)
         {
             // automatically resize array.