* Irish hold Portugal to 1-1 draw * Postiga spares home team's blushes LISBON, Oct 16 (Reuters) - A late Helder Postiga goal saved Portugal from an embarrassing defeat on the night Cristiano Ronaldo won his 100th cap as they drew 1-1 with Northern Ireland in World Cup Group F qualifying on Tuesday. Aberdeen winger Niall McGinn gave the Irish a shock lead when he made the most of a fast counter attack in the 30th minute. Postiga then grabbed the equaliser with 11 minutes to go on a rain-soaked pitch at the Dragao Stadium. ... More...