[gtk+] wayland: Use display from GdkDragContext device

[Carlos Garnacho <carlosg src gnome org>]

commit e43ec48e837b6b458a1b89658ecc19bff9f90265
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Feb 17 19:45:50 2015 +0100

    wayland: Use display from GdkDragContext device
    
    It will be useless to check the source window on the destination side,
    it's at the moment always NULL. Fetch the display from the device instead,
    which will be set for every GdkDragContext.

 gdk/wayland/gdkdnd-wayland.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/gdk/wayland/gdkdnd-wayland.c b/gdk/wayland/gdkdnd-wayland.c
index 39914c5..f558bb5 100644
--- a/gdk/wayland/gdkdnd-wayland.c
+++ b/gdk/wayland/gdkdnd-wayland.c
@@ -382,7 +382,11 @@ _gdk_wayland_drop_context_new (GdkDevice             *device,
 void
 gdk_wayland_drop_context_update_targets (GdkDragContext *context)
 {
-  GdkDisplay *display = gdk_window_get_display (context->source_window);
+  GdkDisplay *display;
+  GdkDevice *device;
+
+  device = gdk_drag_context_get_device (context);
+  display = gdk_device_get_display (device);
   g_list_free (context->targets);
   context->targets = g_list_copy (gdk_wayland_selection_get_targets (display));
 }