[gedit] [osx] only check GeditWindow-s for getting active window

[Jesse van den Kieboom <jessevdk src gnome org>]

commit e5c24c9fa0d89fa4707ce81e6a50bdae92479e8f
Author: Jesse van den Kieboom <jessevdk gmail com>
Date:   Mon Sep 8 16:27:58 2014 +0200

    [osx] only check GeditWindow-s for getting active window

 gedit/gedit-app-osx.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gedit/gedit-app-osx.c b/gedit/gedit-app-osx.c
index 189be17..43af394 100644
--- a/gedit/gedit-app-osx.c
+++ b/gedit/gedit-app-osx.c
@@ -53,6 +53,11 @@ ensure_window (GeditAppOSX *app,
                        continue;
                }
 
+               if (!GEDIT_IS_WINDOW (window))
+               {
+                       continue;
+               }
+
                win = gtk_widget_get_window (GTK_WIDGET (window));
                nswin = gdk_quartz_window_get_nswindow (win);