[libdazzle] shortcuts: use toplevel when no focus

[Christian Hergert <chergert src gnome org>]

commit 2994cee072f45edd5b37f256e97872d9ae005717
Author: Christian Hergert <chergert redhat com>
Date:   Sat Jun 17 15:57:50 2017 -0700

    shortcuts: use toplevel when no focus
    
    If there is no focus widget, we want to assume the whole of the toplevel
    is focused so that we can still resolve actions/controllers/etc.

 src/shortcuts/dzl-shortcut-manager.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/shortcuts/dzl-shortcut-manager.c b/src/shortcuts/dzl-shortcut-manager.c
index 1f93e24..7e82ddb 100644
--- a/src/shortcuts/dzl-shortcut-manager.c
+++ b/src/shortcuts/dzl-shortcut-manager.c
@@ -692,6 +692,9 @@ dzl_shortcut_manager_handle_event (DzlShortcutManager *self,
   modifier = event->state & gtk_accelerator_get_default_mod_mask ();
   widget = focus = gtk_window_get_focus (GTK_WINDOW (toplevel));
 
+  if (widget == NULL)
+    widget = focus = toplevel;
+
   while (widget != NULL)
     {
       G_GNUC_UNUSED g_autoptr(GtkWidget) widget_hold = g_object_ref (widget);