tree cdfc4bd471ec5fd6750c7142338f8362b9646d05
parent f445ff7c55769ca79f7f9827acc38ea06dc61e80
author Chih-Hung Hsieh <chh@google.com> 1493769625 -0700
committer Chih-Hung Hsieh <chh@google.com> 1493835486 -0700

Check existence of a ReviewerInfo field before use.

Some fields like 'approvals' in a ReviewerInfo could be missing
for special users that do not vote.

Change-Id: Ia7b4e39c5e3e2ed053c23781db8a6c9c6f90cb68