BAGHDAD, Oct 29 (Reuters) - A U.S. general was wounded by a roadside bomb that exploded beside his convoy in northern Baghdad on Monday, the highest-ranking American soldier to be wounded since the start of the war, the U.S. military said. Brigadier General Jeffrey Dorko, commanding general of the Gulf Region Division of the U.S. Army Corps of Engineers, had been evacuated out of Iraq for treatment, a spokesman said. His wounds were not life threatening and he was in stable condition.