Saturdays with HitchcockBy: Ellen Wittlinger Twelve year old movie loving Maisie is in need of a distraction from her current romantic dilemma when her Uncle Walt comes to stay with her family after being hurt on the set of the movie he's filming in Hollywood. Maisie's best friend, Cyrus, has been hanging out a lot with Gary Hackett, whose last name sounds to Maisie like a cat barfing up a hairball. When it seems as if Hackett might like Maisie romantically, she's none too