Steve Granitz/FilmMagic There’s only one icon who could get Sarah Michelle Gellar to consider a possible Buffy the Vampire Slayer revival: Dolly Parton. “I mean, like, if Dolly Parton is going to call me I’m always available to take a phone call from the queen,” Gellar, 47, exclusively told Us Weekly while attending the Front Row Fashion Awards at the Beverly Hills Hotel in Los Angeles on Friday, April 26. Based on the 1992 film of the same name, Buffy premiered as a midseason replacement TV sho