RIYADH (Reuters) - Saudi police killed a top spiritual guide for the Saudi wing of Osama bin Laden's al Qaeda network during a shootout in Riyadh on Wednesday, security sources said. They named the slain militant as Abdullah al-Roshood, on a list of 26 most wanted suspects, and said his death was a hefty blow to the ideological hierarchy of al Qaeda in the world's biggest oil exporter. The Interior Ministry said a policeman was also killed in the gun battle, the first militant violence since Saudi forces killed the leader of al Qaeda in the kingdom 12 days ago....