Former inmate Martha Stewart has some fashion advice for Felicity Huffman. The 78-year-old TV personality — who served a five-month prison sentence in 2004 after she was convicted of lying to federal investigators about securities violations — spoke with David Zaslav and moderator Brian Stetler at a Vanity Fair summit in Los Angeles on Tuesday to launch Discovery’s Food Network Kitchen, sharing some words of wisdom for the recently incarcerated “Desperate Housewives” star, 56. “She should style her outfit a little bit more. She looked pretty schlumpy,” the lifestyle guru deadpanned, adding on a more serious note, “She made a horrible mistake, and she’s experiencing what happens.”