Martin Short hasn't been seen much since his daughter Katherine 's tragic death by suicide ... but he stepped out Friday evening for dinner with a talented Hollywood director. The longtime comic actor made an appearance in Santa Monica ... wearing a neat black blazer over a button-down shirt. Photogs got him jumping into a car driven by "Lost" co-creator J.J. Abrams, who is a longtime friend of Short's. Short didn't seem his usual chipper self -- no smile on his face as he sat in the passenger