Fix another stray "msort()/msortv()" issue

Summary: Ref T13303. See B22967. This should be "msortv()" but didn't get updated properly.

Test Plan: The system works!

Reviewers: amckinley

Reviewed By: amckinley

Maniphest Tasks: T13303

Differential Revision: https://secure.phabricator.com/D20585

src/applications/differential/command/DifferentialActionEmailCommand.php

@@ -56,7 +56,7 @@ final class DifferentialActionEmailCommand
 
   public function getCommandObjects() {
     $actions = DifferentialRevisionActionTransaction::loadAllActions();
-    $actions = msort($actions, 'getRevisionActionOrderVector');
+    $actions = msortv($actions, 'getRevisionActionOrderVector');
 
     $objects = array();
     foreach ($actions as $action) {