Martha Stewart Living Omnimedia has "contingency plans" in case its famous founder is found guilty of lying to investigators, the company said yesterday. Chief Executive Sharon Patrick did not elaborate on what those plans involve, though they no doubt include the introduction of more magazine titles and products that do not feature the domestic diva's name. In a conference call to discuss the company's fourth-quarter earnings, James Follo, MSO's chief financial officer, predicted a rebound if Stewart is acquitted. "In a positive outcome, we expect to get back some advertising relatively quick," he said. But because many advertisers buy in annual blocks, "the rebound from certain advertisers may be delayed into the following year." The jury in Stewart's trial for lying to investigators continued deliberations yesterday. Though the fourth-quarter results were better than some analysts had predicted, they showed that MSO has problems that extend beyond Stewart's personal legal troubles.