tree 0aec7caa40eb530cd5ec8f39049c69ff6b0e5a2d
parent 355520e35ed69c60b755fbca630b9939f35b6eb2
author Ying Wang <wangying@google.com> 1406659357 -0700
committer Ying Wang <wangying@google.com> 1406659357 -0700

Fix error: 'NoneType' object is not iterable

Change-Id: I5a54edbed0e5e5481a570b93c07d50f6ca3e18e0