Actress Shelley Long was spotted looking downcast while breaking cover for the first time since skipping a surprise Cheers reunion at this year’s Emmy Awards, RadarOnline.com has learned. The rare sighting of Long, 74, came over the weekend. According to photos obtained by Daily Mail, the Cheers actress was spotted walking her dog outside her Pacific Palisades home. Long appeared downcast and lost in thought as she walked her pooch around the Los Angeles neighborhood with her head down while dressed in a turquoise turtleneck sweater, black peacoat, and sweatpants. She appeared almost unrecogni…