PROVIDENCE, R.I. — An early-morning fire Saturday displaced 13 adults and one child, sending two of them to the hospital.Firefighters were called at 4:15 a.m. to 19 Julian St., where residents were reporting smoke in a second-floor hallway, Battalion Chef Kevin Jutras said.When firefighters arrived occupants were trapped on the second and third floors of the 3 1/2-story wooden frame structure by heavy fire in the hallway and a second-floor apartment, he said.