BRAD Pitt, reformed pot smoker? The “Inglourious Basterds” star was on Bill Maher‘s show on Friday, and Maher recalled a party where Pitt rolled one perfect joint after another. “I’m an artist,” Pitt said of his rolling skills. But Pitt said he no longer partakes of the weed, explaining it turns him “into a doughnut . . . I’m a dad now. You want to be alert.” However, if Pitt really quit, it was within the last 13 months. “Basterds” director Quentin Tarantino told Howard Stern on Sirius Satellite Radio this week of his visit to Pitt in France last July, when Angelina Jolie was about to give birth to twins. As recounted by a Web site that logs Stern’s show, Tarantino said: “Brad had this big brick of hash . . . He said that Brad whipped out a knife and cut up a big sliver for him and the stuff was pretty good. He said that he asked for a pipe to go with it and Brad handed him a Coke can to use instead. Quentin said that would make for a great scene in a movie and he may have to use that.”