Yet another popular actor from the “Buffy the Vampire Slayer” spinoff series “Angel” has died. Andy Hallett, who played “Lorne,” died at Cedars-Sinai Hospital in Los Angeles with his father, Dave, at his side. Hallett is a virtual unknown in the acting industry outside of his “Angel” work. In fact, he didn’t even have an agent when “Angel” co-creator Joss Whedon, who was good friends with Hallett, asked him to audition for Lorne for the show’s second season on The WB. It required the actor to wear green face makeup, red eyes and horns. Hallett won the role, and would last 76 episodes, according to Internet Movie Database. He also had an uncredited role as a student in the popular “Buffy” episode “Hush,” and voiced Cricket in the animated film “Gepetto’s Secret.” Hallett was …