[mutter] wayland: Avoid use of struct data after destruction

[Carlos Garnacho <carlosg src gnome org>]

commit 405f1ce3d07323fa1303416f322da7283160a7f9
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Sep 28 14:24:04 2015 +0200

    wayland: Avoid use of struct data after destruction
    
    data_device_end_drag_grab() will destroy the MetaWaylandDragGrab struct,
    so we definitely must not use it after destruction.

 src/wayland/meta-wayland-data-device.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/wayland/meta-wayland-data-device.c b/src/wayland/meta-wayland-data-device.c
index 1859b5d..61acdc6 100644
--- a/src/wayland/meta-wayland-data-device.c
+++ b/src/wayland/meta-wayland-data-device.c
@@ -403,8 +403,8 @@ destroy_data_device_origin (struct wl_listener *listener, void *data)
     wl_container_of (listener, drag_grab, drag_origin_listener);
 
   drag_grab->drag_origin = NULL;
-  data_device_end_drag_grab (drag_grab);
   meta_wayland_data_device_set_dnd_source (&drag_grab->seat->data_device, NULL);
+  data_device_end_drag_grab (drag_grab);
 }
 
 static void
@@ -413,8 +413,8 @@ drag_grab_data_source_destroyed (gpointer data, GObject *where_the_object_was)
   MetaWaylandDragGrab *drag_grab = data;
 
   drag_grab->drag_data_source = NULL;
-  data_device_end_drag_grab (drag_grab);
   meta_wayland_data_device_set_dnd_source (&drag_grab->seat->data_device, NULL);
+  data_device_end_drag_grab (drag_grab);
 }
 
 static void