The ward boundaries south suburban Chicago Heights adopted in 2014 pass muster under the U.S. Constitution, a federal appeals court held Monday.The 7th U.S. Circuit Court of Appeals rejected the argument that population differences among the seven single-member wards for the election of aldermen violate the principle of one person, one vote.Citing Gaffney v. Cummings, 412 U.S. 735 (1973), a panel of the court conceded governments are required to make a good-faith effort to draw up districts of equal population.The panel …