[gnome-shell] polkitAgent: Fix ReferenceError exception

[Carlos Garnacho <carlosg src gnome org>]

commit 59a70fbc63649af4b1bae39c52269818de75d29a
Author: Carlos Garnacho <carlosg gnome org>
Date:   Sun Jul 16 21:24:30 2017 +0200

    polkitAgent: Fix ReferenceError exception
    
    Introduced in commit 593b4318a. The "message" variable was renamed
    everywhere, except where it's defined.

 js/ui/components/polkitAgent.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/js/ui/components/polkitAgent.js b/js/ui/components/polkitAgent.js
index 9ab8433..cfa5355 100644
--- a/js/ui/components/polkitAgent.js
+++ b/js/ui/components/polkitAgent.js
@@ -31,7 +31,7 @@ const AuthenticationDialog = new Lang.Class({
     Name: 'AuthenticationDialog',
     Extends: ModalDialog.ModalDialog,
 
-    _init: function(actionId, message, cookie, userNames) {
+    _init: function(actionId, body, cookie, userNames) {
         this.parent({ styleClass: 'prompt-dialog' });
 
         this.actionId = actionId;