Morton's bid to claim a play-off place in the Ladbrokes Championship was dented after they were held to a 0-0 draw at struggling Livingston.Morton threatened first when Declan McManus cut inside and unleashed a powerful shot after 17 minutes which was saved low to his right by Livingston keeper Marc McCallum.Eight minutes later Livingston carved out an opening on the counter-attack but Jordan White fired over from eight yards. Daniel Mullen also shot wide from the edge of the box for the home side.Morton were denied a penalty in the second half when Denny Johnstone appeared to be pulled back in the box.The visitors then had a flurry of shots in the Livingston box, McCallum finally tipping Bobby Barr's shot over as Morton were forced to settle for a draw.