[gedit] Fix cast warning

[Paolo Borelli <pborelli src gnome org>]

commit 7e359ced366142157e00e4645be90c677404f405
Author: Paolo Borelli <pborelli gnome org>
Date:   Sun Apr 24 11:37:11 2016 +0200

    Fix cast warning

 gedit/gedit-app.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gedit/gedit-app.c b/gedit/gedit-app.c
index 9e17552..7b68e1a 100644
--- a/gedit/gedit-app.c
+++ b/gedit/gedit-app.c
@@ -812,7 +812,7 @@ gedit_app_startup (GApplication *application)
        /* menus */
        if (!show_menubar ())
        {
-               gtk_application_set_menubar (application, NULL);
+               gtk_application_set_menubar (GTK_APPLICATION (application), NULL);
                priv->hamburger_menu = get_menu_model (GEDIT_APP (application),
                                                       "hamburger-menu");
        }