[gnome-shell] messageTray: Correctly show the icon on a notification stack

[Jasper St. Pierre <jstpierre src gnome org>]

commit fd99d13f04b4618462a218d1476f820f182626e5
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu Feb 16 17:23:16 2012 -0500

    messageTray: Correctly show the icon on a notification stack
    
    An actor is removed from its parent after it emits the destroy signal,
    so we can't just check if the notification stack has more than one
    notification -- we need to check if there's a notification there
    that is not the current one.
    
    This was causing spew in the form of:
    
        "this.notificationStack.get_children()[0]._delegate.setIconVisible
         is not a function"

 js/ui/messageTray.js |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 1c7f0ba..9ccc6e4 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1327,8 +1327,9 @@ const SummaryItem = new Lang.Class({
             }
         }
 
-        if (this.notificationStack.get_children().length > 0)
-            this.notificationStack.get_children()[0]._delegate.setIconVisible(true);
+        let firstNotification = this._stackedNotifications[0];
+        if (firstNotification)
+            firstNotification.notification.setIconVisible(true);
     }
 });
 Signals.addSignalMethods(SummaryItem.prototype);