Fix for D6260

Summary: Fixes a query in √D6260.

Test Plan: View a Releeph RQ and verify that the "churn" field renders and has the right numbers in it.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6702

src/applications/releeph/field/specification/ReleephDiffChurnFieldSpecification.php

@@ -19,10 +19,9 @@ final class ReleephDiffChurnFieldSpecification
     }
 
     $diff_rev = $this->getReleephRequest()->loadDifferentialRevision();
-    $comments = id(new DifferentialRevisionQuery())
-      ->setViewer($this->getUser())
+    $comments = id(new DifferentialCommentQuery())
       ->withRevisionIDs(array($diff_rev->getID()))
-      ->excute();
+      ->execute();
 
     $counts = array();
     foreach ($comments as $comment) {