LOS ANGELES -- In weighing his vote on a proposed union contract with Hollywood producers, veteran stagehand Matthew “Doc” Brashear looked closely at the agreement and beyond, to the now-closed New Mexico film set where a cinematographer died.For crew member Brandy Tannahill, the fatal “Rust” shooting of Halyna Hutchins and the resurgence of labor actions, such as the strikes at John Deere and Kellogg, are bolstering her decision.When voting starts Friday on a tentative three-year agreement