Since May 1, Minden resident Tara Smith Addeo has been living a life she can only describe as surreal.That’s the day her older brother, 20th Century Fox executive Gavin Smith, 57, was reported missing in Los Angeles. His story will be told tonight on “America’s Most Wanted,” and Addeo and her family hope the broadcast will jostle a memory or spark a recollection in anyone who can shed light on the whereabouts of her brother.“Every day seems surreal to me,” Addeo said in an interview Tuesday. “I wake up, and I am ready to greet the day. But within a …