Moved Iterator to protected section, since new gcc seems to (correctly?) complain if its private when deriving PolyGraphicIterator from it if its private.
Moved Iterator to protected section, since new gcc seems to (correctly?)
complain if its private when deriving PolyGraphicIterator from it if its
private.


stefanseefeld/fresco,stefanseefeld/fresco,stefanseefeld/fresco,stefanseefeld/fresco,stefanseefeld/fresco