For many filmgoers, the only rating more disreputable than NC-17 is G, as in gag me. The animated "Beauty and the Beast" undid some of the sugary curse. But "Aladdin," Disney's worthy follow-up to Beauty, is so funny and scrappy you don't need to drag a kid along. Even a work-in-progress print shows a wicked new playfulness (think "Simpsons," not "Snow White"). Granted, for an Arabian Nights tale there could have been more ethnic richness in the script and the drawing. But Robin Williams, who…