Fixed bug with same item can be added to avoid roads twice

OsmAnd-java/src/net/osmand/router/RoutingConfiguration.java

@@ -114,9 +114,11 @@ public class RoutingConfiguration {
 		}
 		
 		public void addImpassableRoad(RouteDataObject r) {
+			if (!impassableRoadIds.contains(r.id)){
 				impassableRoadIds.add(r.id);
 				impassableRoads.add(r);
 			}
+		}
 		
 		
 		private String getAttribute(VehicleRouter router, String propertyName) {