[polari] userList: Initialize another property early

[Florian Müllner <fmuellner src gnome org>]

commit d7a58525f9668b6e272dc4c44bf798be32c9929d
Author: Florian Müllner <fmuellner gnome org>
Date:   Tue Feb 21 21:11:31 2017 +0100

    userList: Initialize another property early
    
    Another fix for the issue described in commit a8b549b0f.

 src/userList.js |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/userList.js b/src/userList.js
index 4703da1..8e6d306 100644
--- a/src/userList.js
+++ b/src/userList.js
@@ -131,6 +131,7 @@ const UserDetails = new Lang.Class({
 
         this._expanded = false;
         this._initialDetailsLoaded = false;
+        this._notificationsEnabled = false;
         this._user = null;
 
         this.parent(params);