Merge branch 'master' of github.com:usnistgov/jsfive

Author: bmaranville

esm/btree.js

@@ -461,14 +461,15 @@ export class BTreeV2 extends AbstractBTree {
     let fmts = this.address_formats.get(node_level);
     if (node_level != 0) {
       let [offset_size, num1_size, num2_size, offset_fmt, num1_fmt, num2_fmt] = fmts;
-      for (let j=0; j<=nrecords; j++) {
+      for (let j=0; j<nrecords; j++) {
         let address_offset = struct.unpack_from(offset_fmt, this.fh, offset)[0];
         offset += offset_size;
         let num1 = struct.unpack_from(num1_fmt, this.fh, offset)[0];
         offset += num1_size;
         let num2 = num1;
         if (num2_size > 0) {
           num2 = struct.unpack_from(num2_fmt, this.fh, offset)[0];
+          offset += num2_size;
         }
         addresses.push([address_offset, num1, num2]);
       }

esm/dataobjects.js

@@ -566,7 +566,7 @@ export class DataObjects {
     //""" Retrieve links from symbol table message. """
     let heap = new FractalHeap(this.fh, heap_address);
     let btree;
-    if (order_btree_address != UNDEFINED_ADDRESS) {
+    if (order_btree_address != null) {
       btree = new BTreeV2GroupOrders(this.fh, order_btree_address);
     }
     else {