Pitmaster and owner Dirk Miller stands outside Miller’s Smokehouse in Belton. (Chris Wilkins/Texas BBQ Posse) On the looks-like scale, Dirk Miller is closer to Kris Kringle than Tom Cruise. But the owner of Miller’s Smokehouse in Belton was channeling Cruise from Risky Business when we visited last week during our Heart of Texas BBQ Tour. For Miller, too, the dream is always the same: He awakes and the sun is shining through his windows, meaning it’s 8 a.m., meaning he overslept, meaning he didn’t get the pits fired by the required 2 or 3 a.m., meaning disaster for his barbecue…