WASHINGTON — Investigators found more than 800 rounds of ammunition in the car of the man accused of scaling the White House fence and sprinting inside the building, a federal prosecutor said Monday. A machete and two hatchets also were found.The accused intruder, former soldier Omar J. Gonzalez, had been arrested earlier in the summer in Virginia with a carful of weapons, authorities said, and the federal prosecutor said Monday in court that Gonzalez had had a map with the White House circled.Assistant U.S.