Give Howie Mandel all due credit – lots of it – for reinvention. In the early 1980s, he was a young standup comic whose goofy act included lots of props, and included such oddball moves as pulling a surgical glove down over his forehead and letting it slowly snap off into the air. Then he joined the initial cast of NBC’s St. Elsewhere, becoming a central member of the ensemble of what was TV’s most daring drama at the time, doing very solid work. Then, after a quiet period, he emerges on a different type of TV entirely: as a judge on America’s Got Talent, and, now and again, a game-show host on Deal or No Deal. And tonight, Mandel stars in his first solo TV comedy standup special in two decades. It comes from Atlantic City, emanating from the comedy club that bears his name – which allows Mandel to use his name three times in the program’s title. That’s funny. And the show hasn’t even started yet…