Case C-13/08: Judgment of the Court (Fourth Chamber) of 22 December 2008 (reference for a preliminary ruling from the Bundesgerichtshof (Germany)) — In the proceedings brought by Erich Stamm, Anneliese Hauser (Agreement between the European Community and its Member States, of the one part, and the Swiss Confederation, of the other, on the free movement of persons — Equal treatment — Self-employed frontier workers — Agricultural lease — Agricultural structure)