public OsmPrePath createPrePath(final OsmPath origin, final OsmLink link) {
        final OsmPrePath p = pm.createPrePath();
        if (p != null) {
            p.init(origin, link, this);
        }
        return p;
    }
clean the nogolist (previoulsy saved by saveFullNogolist())
by removing nogos with waypoints within
main/src/main/java/cgeo/geocaching/brouter/core/RoutingContext.java