[gtk+] gtkapplication: Fix passing NULL as the window to inhibit

[Matthias Clasen <matthiasc src gnome org>]

commit 1409d7c4bdc22238e19578b1f37dd312f4bcb9da
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Apr 11 10:53:45 2014 +0200

    gtkapplication: Fix passing NULL as the window to inhibit
    
    gtk_application_inhibit() supports passing NULL, so don't
    blindly pass the NULL window to
    gtk_application_impl_dbus_get_window_system_id().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=728023

 gtk/gtkapplication-dbus.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkapplication-dbus.c b/gtk/gtkapplication-dbus.c
index cd145d2..b0dab70 100644
--- a/gtk/gtkapplication-dbus.c
+++ b/gtk/gtkapplication-dbus.c
@@ -339,7 +339,7 @@ gtk_application_impl_dbus_inhibit (GtkApplicationImpl         *impl,
                                 "Inhibit",
                                 g_variant_new ("(s usu)",
                                                dbus->app_id,
-                                               gtk_application_impl_dbus_get_window_system_id (dbus, window),
+                                               window ? gtk_application_impl_dbus_get_window_system_id 
(dbus, window) : 0,
                                                reason,
                                                flags),
                                 G_DBUS_CALL_FLAGS_NONE,