Case C-524/06: Judgment of the Court (Grand Chamber) of 16 December 2008 (reference for a preliminary ruling from the Oberverwaltungsgericht für das Land Nordrhein-Westfalen (Germany)) — Heinz Huber v Bundesrepublik Deutschland (Protection of personal data — European citizenship — Principle of non-discrimination on grounds of nationality — Directive 95/46/EC — Concept of necessity — General processing of personal data relating to citizens of the Union who are nationals of another Member State — Central register of foreign nationals)