Fix: Add missing super call

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/datastructure/ConcretePolygon.java

@@ -183,6 +183,7 @@ public class ConcretePolygon extends Polygon {
 	 */
 	@Override
 	public void accept(Check c) {
+		super.accept(c);
 		if (c.canExecute(this)) {
 			c.check(this);
 		}