About the only thing kept in this film from Preston Sturges origianl story for “The Miracle of Morgan’s Creek” is a girl that gets drunk, gets married, gets pregnant and doesn’t even remember any of it. A major dirrerence is that “The Miracle of Morgan’s Creek” was a classic comedy and “Rock-a-Bye Baby” isn’t. This time out, Clayton Poole (Jerry Lewis) is a small town TV repair…