BY DOMINGO RAMIREZ JR. Hooshang Vatanpour never talked about the dangers of being a cab driver in North Texas. That was because the 56-year-old Allen father of four was too busy working 12-to 14-hour days, his daughter said Tuesday.And besides, for more than 20 years, Vatanpour had seen his share of danger in Iran as he was persecuted for his religious beliefs as a member of the Bahai faith, Lida Vatanpour said Tuesday.He had been through so much in Iran, she said.