After a nearly 50-year run in Hollywood, Danny DeVito is the kind of star with generations of fans. In this week’s “Sunday Sitdown,” Willie Geist talks to the actor and Oscar-nominee about that lengthy career, from his first big role in “One Flew Over the Cuckoo’s Nest” to “Taxi,” “Twins,” and “It’s Always Sunny in Philadelphia,” as well as his latest performance in the new live-action version of the Disney classic “Dumbo.”