Ever since Woody Allen confirmed Carla Bruni-Sarkozy in the cast of his new movie, “Midnight in Paris,” there’s always someone in the international press willing to criticize the acting skills of France’s first lady. And isn’t it that she’s going to have an excellent platform to show off her acting chops? * We can explain: the movie has been chosen to open the 64th Cannes Film Festival, starting May 11. The romantic comedy stars Owen Wilson, Rachel McAdams and Marion Cotillard, and was shot last year in Paris. Robert De Niro will preside this year’s jury.