[gtk+] printing: Fix sensitivity of the Print button

[Marek Kašík <mkasik src gnome org>]

commit 31748fa5c082895a0b78c7697180f1c9ac2ee5ae
Author: Marek Kasik <mkasik redhat com>
Date:   Fri Feb 21 15:39:05 2014 +0100

    printing: Fix sensitivity of the Print button
    
    Don't make Print button sensitive until a printer is selected.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=724895

 gtk/gtkprintunixdialog.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkprintunixdialog.c b/gtk/gtkprintunixdialog.c
index 12cf742..6fd82bf 100644
--- a/gtk/gtkprintunixdialog.c
+++ b/gtk/gtkprintunixdialog.c
@@ -710,6 +710,7 @@ gtk_print_unix_dialog_init (GtkPrintUnixDialog *dialog)
 {
   GtkPrintUnixDialogPrivate *priv;
   GtkTreeSortable *sort;
+  GtkWidget *widget;
 
   dialog->priv = gtk_print_unix_dialog_get_instance_private (dialog);
   priv = dialog->priv;
@@ -735,6 +736,8 @@ gtk_print_unix_dialog_init (GtkPrintUnixDialog *dialog)
                           _("_Print"), GTK_RESPONSE_OK,
                           NULL);
   gtk_dialog_set_default_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
+  widget = gtk_dialog_get_widget_for_response (GTK_DIALOG (dialog), GTK_RESPONSE_OK);
+  gtk_widget_set_sensitive (widget, FALSE);
 
   /* Treeview auxilary functions need to be setup here  */
   gtk_tree_model_filter_set_visible_func (priv->printer_list_filter,