[gtk/fix-print-dialog] Update the print dialog for headerbar changes

[Matthias Clasen <matthiasc src gnome org>]

commit 19a4e760340b1ee4333d46d77a3b3c676ee4a7cb
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Nov 1 12:51:42 2019 -0400

    Update the print dialog for headerbar changes
    
    This was breaking the templates test.

 gtk/gtkprintunixdialog.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkprintunixdialog.c b/gtk/gtkprintunixdialog.c
index d2d516c569..f59e85afae 100644
--- a/gtk/gtkprintunixdialog.c
+++ b/gtk/gtkprintunixdialog.c
@@ -827,8 +827,8 @@ gtk_print_unix_dialog_constructed (GObject *object)
        GtkWidget *button, *parent;
        button = gtk_dialog_get_widget_for_response (GTK_DIALOG (object), GTK_RESPONSE_APPLY);
        g_object_ref (button);
-       parent = gtk_widget_get_parent (button);
-       gtk_container_remove (GTK_CONTAINER (parent), button); 
+       parent = gtk_widget_get_ancestor (button, GTK_TYPE_HEADER_BAR);
+       gtk_container_remove (GTK_CONTAINER (gtk_widget_get_parent (button)), button);
        gtk_header_bar_pack_end (GTK_HEADER_BAR (parent), button);
        g_object_unref (button);
     }