[NaCl SDK] MountNodeDir::GetDents sets d_off instead of leaving it undefined.

native_client_sdk/src/libraries/nacl_io/mount_node_dir.cc

 /* Copyright (c) 2012 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "nacl_io/mount_node_dir.h"
 
 #include <errno.h>
 #include <string.h>
 
 #include "nacl_io/osdirent.h"
@@ skipping 111 matching lines @@
 }
 
 void MountNodeDir::BuildCache() {
   if (map_.size()) {
     cache_ = (struct dirent *) malloc(sizeof(struct dirent) * map_.size());
     MountNodeMap_t::iterator it = map_.begin();
     for (size_t index = 0; it != map_.end(); it++, index++) {
       MountNode* node = it->second;
       size_t len = it->first.length();
       cache_[index].d_ino = node->stat_.st_ino;
+      cache_[index].d_off = sizeof(struct dirent);
       cache_[index].d_reclen = sizeof(struct dirent);
       cache_[index].d_name[len] = 0;
       strncpy(cache_[index].d_name, &it->first[0], len);
     }
   }
 }