John Hopewell Chief International CorrespondentEuropean production-distribution-sales powerhouse Studiocanal is on board the Paris Bataclan attack feature “Un año, una noche,” with Nahuel Pérez Biscayart, breakout star of “BPM (Beats Per Minute),” set to topline.A Spanish-French co-production, “Un año, una noche” is produced by Bambú Producciones, creator of hit Spanish drama series such as “Gran Hotel,” “Velvet” and “Cable Girls”; Mister Fields and Friends, Bambu’s movie production label; and