Sometimes being subtle with your movie can be an overdone trait. Case in point Ira Sach’s latest film “Frankie,” which just premiered in competition at Cannes. This unconventional family gathering takes place by the seaside of Portuguese town of Sintra, which makes this the first time Sachs has managed to shoot a film outside his native New York City. An attempt at evoking Eric Rohmer’s anti-romanticism, “Frankie” falls completely flat