The city will avoid any damages that might be awarded a man who alleges an off-duty Chicago police officer dislocated several of his fingers while trying to arrest him in the suburbs. In a written opinion Thursday, U.S. District Judge Gary Feinerman did not rule on the merits of the accusations Stephen Anderson has leveled against George Moussa. Anderson maintains Moussa — a Chicago police officer who was then his brother-in-law — used excessive force against him in a 2013 incident. But Feinerman held Illinois law …