When one needs a well-seasoned badass for one's film, one would have to be out of one's tiny little mind to not call Liam Neeson. That fact is certainly not lost on Warner Brothers. Along with Roy Lee of Vertigo Entertainment, WB is producing a film called 'The All Nighter.' The plot revolves around an aging hitman who must take on his former employers over the course of a single night in order t…