She's famed for playing icy control freaks. But Lindsay Duncan wanted more laughs in her new film Le Week-end. And, really, she'd love to pack it all in and head for IndiaHappy news for the autumn day: love dies and flesh withers and your nearest and dearest can become your deadliest foe. This, at least, is the set up for Le Week-end, a bitter, biting drama about bitter, biting people; a film that rages against the d…