LOS ANGELES (Reuters) - R&B singer Chris Brown had his probation reinstated by a judge in Los Angeles on Friday after the Grammy winner agreed to complete an additional 1,000 hours of community labor stemming from his 2009 sentence for assaulting singer Rihanna. Brown's probation had been revoked last month by Los Angeles County Superior Court Judge James Brandlin after he was charged in a May hit-and-run traffic accident, which could have led to a probation violation and possible jail time. The charges in the hit-and-run case have since been dismissed. ...