A 30-year-old man lost his life last night after locking himself out of his apartment. Sometime between 8:15 p.m. and 8:40 p.m., Paul Reilly fell five stories, landing on his back in the courtyard behind the building where he lived on 65th St. and 1st Ave. in Manhattan. Reilly, who had apparently gained entrance to the building but was locked out of his apartment, attempted to climb out a hallway window, over to a window......