Veteran casting director Patrick “Geno” Havens, whose credits include the Steve Martin classic The Jerk but who might most fondly be remembered for such ’70s cult classics as Switchblade Sisters, The Swinging Cheerleaders and Brian de Palma’s The Phantom of the Paradise, died Thursday at USC Medical Center in Los Angeles. He was 75 and had recently suffered a stroke. Though he had a few acting and producing credits, it was as a casting director that Havens left his mark…