A gunman opened fire at an Austin intersection early Sunday morning as the annual South by Southwest festival was coming to a close. Four people were shot, but there were no life-threatening injuries, according to the Austin Police Department. All four were taken to a “casualty collection point,” then by ambulance to a nearby trauma center, according to the Austin-Travis County EMS. None of the victims have been publicly identified. A suspect was taken into custody around 6 a.m., about two hours later, but was also not identified. No charges have been announced. A spokesperson for the Austin P…