ElasticChangeIndex: Fix case when PATCH_SET field not requested

The document does not contain the PATCH_SET field if it wasn't
requested, so we should set the value in the ChangeData to null. The
implementation of decodeProtos was missing this case.

Change-Id: Ib9f254880bef1f534a2ee2f60bdda3fa15b7c73e
1 file changed
tree: e7e0e0053804a827f94b1123549c66b48a73748d
  1. gerrit-elasticsearch/
  2. lib/