Since he broke through with a star-making performance 40 years ago in Easy Rider, Jack Nicholson — who today turns 72 — has made 45 films, or a little more than one a year. Except he hasn’t made a film since ’07’s The Bucket List and apparently has no irons in the fire. So what’s going on? His absence has just hit me so I’m asking. I’m thinking of Jack Cardiff having worked until his early ’90s. There’s no fun in sitting around.