Expose NodeAccess as protected

Expose the nodeAccess variable to be protected so subclasses can access geometry properties of nodes

reader-osm/src/main/java/com/graphhopper/reader/osm/OSMReader.java

@@ -84,7 +84,7 @@ public class OSMReader implements DataReader {
     private static final Logger LOGGER = LoggerFactory.getLogger(OSMReader.class);
     private final GraphStorage ghStorage;
     private final Graph graph;
-    private final NodeAccess nodeAccess;
+    protected final NodeAccess nodeAccess;
     private final LongIndexedContainer barrierNodeIds = new LongArrayList();
     private final DistanceCalc distCalc = Helper.DIST_EARTH;
     private final DistanceCalc3D distCalc3D = Helper.DIST_3D;