SPRINGFIELD — A state law on snow and ice removal protects property owners from slip-and-fall lawsuits when they work to rid their premises of slick buildups.But it doesn’t shield them from liability for injuries when the accumulation is caused by an underlying defect in the property.That was the consensus from the Illinois Supreme Court this week as the state’s top justices unanimously ruled the law does not prevent a woman from suing her condominium association after she slipped on ice outside her home …