[gtk+] GtkWindow: Don't double free export user data

[Jonas Ådahl <jadahl src gnome org>]

commit 477556aac21c2e7b96554838849b68fcb6a84ec7
Author: Jonas Ådahl <jadahl gmail com>
Date:   Tue May 9 23:07:02 2017 +0800

    GtkWindow: Don't double free export user data
    
    The user data passed when exporting a Wayland window was supposed to be
    freed using the destroy_func, as is commonly done. This was previously
    broken, as the user data was just NULL:ed when exported, and only
    actually destroyed when unexporting before having exported.
    
    While e016d9a5dba6f6f99aee94d0b72c00bee299b96a fixed this, it introduced
    a regression, as GtkWindow was nice enough to free the memory anyway
    after having received the exported handle, causing it now to double
    free.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782109

 gtk/gtkwindow.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)
---
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 6efc3cc..813a797 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -11261,8 +11261,6 @@ wayland_window_handle_exported (GdkWindow  *window,
   handle_str = g_strdup_printf ("wayland:%s", wayland_handle_str);
   data->callback (data->window, handle_str, data->user_data);
   g_free (handle_str);
-
-  g_free (data);
 }
 #endif