In a business that burns through people quickly, Brett Rickaby is a long-distance runner whose name has been turning up in credits for decades. 'A Million Ways to Die in the West' counts among the more visible credits. Casting directors have gone to him for horror more than for anything else. Counting cinema and television together, the tally passes 54 titles. The film 'Zodiac' accounts for more of the public profile than anything else does.