Robert Pattinson might stick with short hair! The hunky British star chopped off his shaggy locks in preparation for his role in new movie Water For Elephants, which also stars Reese Witherspoon. And Pattinson — who plays vampire Edward Cullen in the Twilight movie franchise — says he’s considering keeping his new style. “I’m thinking Edward might have a little bit of a haircut in Breaking Daw…