Panhandlers who sued the city of Chicago failed to make the case that police detentions violated their constitutional freedom from unreasonable seizures, a federal judge held.In a written opinion this week, U.S. District Judge Harry D. Leinenweber granted summary judgment in favor of the city on the Fourth Amendment claim brought by seven panhandlers.The panhandlers maintain police stopped them on the street anywhere from one to 20 times during the two-year period beginning February 2011 and then held on to their …