[polari] Minor optimization

[Florian Müllner <fmuellner src gnome org>]

commit 27c3eb4af278ce73b322eed62ac1d62d16bf94f5
Author: Florian Müllner <fmuellner gnome org>
Date:   Wed Jul 24 22:49:50 2013 +0200

    Minor optimization

 src/roomList.js |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/roomList.js b/src/roomList.js
index 38e8996..baeea8c 100644
--- a/src/roomList.js
+++ b/src/roomList.js
@@ -159,6 +159,9 @@ const RoomList = new Lang.Class({
             return;
         }
 
+        if (row.get_header())
+            return;
+
         let label = new Gtk.Label({ xalign: 0,
                                     max_width_chars: 15,
                                     ellipsize: Pango.EllipsizeMode.END });