[recipes] printing: Make the error dialog modal

[Matthias Clasen <matthiasc src gnome org>]

commit 3a827864442ed8947c6eaa360a6a269bd22dcb49
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Feb 7 12:35:31 2017 -0500

    printing: Make the error dialog modal
    
    This makes it properly centered on the main window.

 src/gr-recipe-printer.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/gr-recipe-printer.c b/src/gr-recipe-printer.c
index 99ca72e..d149f90 100644
--- a/src/gr-recipe-printer.c
+++ b/src/gr-recipe-printer.c
@@ -456,6 +456,7 @@ print_done (GtkPrintOperation       *operation,
                 gtk_print_operation_get_error (operation, &error);
 
                 error_dialog = gtk_message_dialog_new (GTK_WINDOW (printer->window),
+                                                       GTK_DIALOG_MODAL |
                                                        GTK_DIALOG_DESTROY_WITH_PARENT,
                                                        GTK_MESSAGE_ERROR,
                                                        GTK_BUTTONS_CLOSE,