[polari] app: Fix another method vs. property issue

[Florian Müllner <fmuellner src gnome org>]

commit 296457977b40b76b8736ae0571fbd863efb7f0d4
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Jul 22 20:35:04 2017 +0200

    app: Fix another method vs. property issue

 src/application.js |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/application.js b/src/application.js
index 95bcf9b..ae701f2 100644
--- a/src/application.js
+++ b/src/application.js
@@ -71,7 +71,7 @@ var Application = new Lang.Class({
 
     isRoomFocused: function(room) {
         return this.active_window &&
-               this.active_window.is_active &&
+               this.active_window['is-active'] &&
                this.active_window.active_room == room;
     },