[gnome-calendar] Add translator-credits to about window

[Piotr DrÄg <piotrdrag src gnome org>]

commit b393f5ed1ccdb6058aa88eca4e8ecad0706b3a19
Author: Piotr DrÄg <piotrdrag gmail com>
Date:   Wed Jan 2 02:39:39 2013 +0100

    Add translator-credits to about window

 src/gcal-application.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/gcal-application.c b/src/gcal-application.c
index a9619df..63258fc 100644
--- a/src/gcal-application.c
+++ b/src/gcal-application.c
@@ -290,13 +290,14 @@ gcal_application_show_about (GSimpleAction *simple,
     }
 
   gtk_show_about_dialog (GTK_WINDOW (app->priv->window),
-                         "program-name", "Calendar",
+                         "program-name", _("Calendar"),
                          "version", VERSION,
                          "copyright", copyright,
                          "license-type", GTK_LICENSE_GPL_3_0,
                          "authors", authors,
                          "artists", artists,
                          "logo-icon-name", "x-office-calendar",
+                         "translator-credits", _("translator-credits"),
                          NULL);
   g_free (copyright);
   g_date_time_unref (date);