Woody Harrelson is a treasure whom the Mill Valley Film Festival, according to founder/executive director Mark Fishkin, had been pursuing some years. They certainly lucked out with the eventual timing, however, since the festival’s tribute Thursday occurred amidst an unprecedented high-profile period for the busy but seldom spotlight-seeking actor. He’s currently sitting atop box-office charts as the biggest marquee name in splatstick comedy Zombieland, in which he’s hilarious. He earned raves at Toronto last month playing a damaged, delusional loner who thinks he’s a superhero in Defendor, which Sony Classics picked up for distribution. Dennis Harvey reports.