Fix a small bug - %d => %s

Summary: easy peasy. noticed it trying to fix an image.

Test Plan: can fix image by phid once more!

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D6659

src/applications/files/management/PhabricatorFilesManagementWorkflow.php

@@ -33,7 +33,7 @@ abstract class PhabricatorFilesManagementWorkflow
           }
         } else {
           $file = id(new PhabricatorFile())->loadOneWhere(
-            'phid = %d',
+            'phid = %s',
             $name);
           if (!$file) {
             throw new PhutilArgumentUsageException(