With the beginning of a new year comes January, the official dumping grounds for the worst of the worst in this year’s film litter, and this week offers up two prime examples with the good possibility of a third. Along with the Uwe Boll video game adaptation of “Bloodrayne,” and the not-dumb-it’s-funny-but-dumb-because-it’s-really-dumb “Grandma’s Boy,” horror auteur Eli Roth’s releases his latest feature, “Hostel.” The film, which has pretty much been described as a movie that would make even the “Saw” guys hurl, has received mostly positive reviews, but with the warning that it might not be as psychotic as the trailers make it seem. Also in wide release this week is the Steven Spielberg political thriller “Munich” and the Heath Ledger romantic comedy “Casanova.”