Richard Lewis died at 76 after suffering a heart attack.That just wasn’t supposed to happen, not now, even for someone like Richard, who was in ill health for several years — but at least it was peaceful, according to his publicist, Jeff Abraham of Jonas Public Relations.Richard “passed away peacefully at his home in Los Angeles last night [Tuesday] after suffering a heart attack,” Abraham said in a statement to The Post. “His wife, Joyce Lapinsky, thanks everyone for all the love, friendship and support and asks for privacy at this time.”I had such a nice interaction with the “Curb Your Enthusiasm” legend several years back when I was researching my biography of Don Rickles, with whom Richard co-starred on the short-lived Fox sitcom “Daddy Dearest” in 1993.