Car Buffs Have Bill in Headlights Jay Leno, others fight measure to end smog check exemption for older vehicles By Miguel Bustillo, Times Staff Writer Comedian Jay Leno, the host of television's "Tonight Show," called Assemblywoman Sally Lieber's office earlier this year and delivered a monologue that wasn't funny at all. Lieber, a Democrat from Mountain View, was sponsoring legislation to end a California exemption that spares many old cars from smog checks. Leno, an avid car collector, considered the bill stupid, and let Lieber's legislative director know it. "He was really angry," said the staffer, Marva Diaz. "I thought...