Case C-63/09: Judgment of the Court (Third Chamber) of 6 May 2010 (reference for a preliminary ruling from the Juzgado de lo Mercantil n °4 de Barcelona — Spain) — Axel Walz v Clickair S.A. (Air transport — Montreal Convention — Liability of carriers in respect of checked baggage — Article 22(2) — Limits of liability in case of destruction, loss, damage or delay of baggage — Concept of ‘damage’ — Material and non-material damage)