Leo Barraclough International Features EditorStefan Ruzowitzky, who won an Oscar for “The Counterfeiters,” is at the Locarno Film Festival on Friday for the world premiere in the iconic Piazza Grande venue of his crime thriller “Hinterland.” He speaks to Variety about the film, which Beta Cinema is selling worldwide.“Hinterland” centers on a former Austrian prisoner of war, Peter Perg, who returns home to Vienna in 1920. Everything has changed.