XM Satellite Radio Holdings on Thursday posted a wider fourth-quarter loss, hurt by higher programming and marketing costs even as revenue more than doubled. In addition, XM said a company director, Pierce Roberts, has resigned from the board because he saw “a significant chance of a crisis on the horizon” and was “troubled” about XM’s direction. XM disclosed Roberts’ resignation in a filing with the U.S. Securities and Exchange Commission, and said Roberts favored cutting spending to boost cash flow.