fix query for doorkeeper

Summary: Got exception in daemon logs.

Test Plan: rerun tasks, not exception.

Reviewers: btrahan, epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D8905

src/applications/diffusion/doorkeeper/DiffusionDoorkeeperCommitFeedStoryPublisher.php

@@ -47,6 +47,7 @@ final class DiffusionDoorkeeperCommitFeedStoryPublisher
 
   public function willPublishStory($commit) {
     $requests = id(new DiffusionCommitQuery())
+      ->setViewer($this->getViewer())
       ->withPHIDs(array($commit->getPHID()))
       ->needAuditRequests(true)
       ->executeOne()