Fix Phame fatal

Summary: Fixes T3847.

Test Plan: "Edit Post"

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Maniphest Tasks: T3847

Differential Revision: https://secure.phabricator.com/D7031

src/applications/phame/controller/post/PhamePostEditController.php

@@ -95,7 +95,7 @@ final class PhamePostEditController
     }
 
     $handle = id(new PhabricatorHandleQuery())
-      ->withViewer($user)
+      ->setViewer($user)
       ->withPHIDs(array($post->getBlogPHID()))
       ->executeOne();