[libwnck/wip/warnings2] pager: don't use deprecated gtk_drag_begin

[Alberts Muktupāvels <muktupavels src gnome org>]

commit bc1df872c1a6fc41e8e6619eb84f7785b901bccf
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Thu Apr 27 14:59:06 2017 +0300

    pager: don't use deprecated gtk_drag_begin

 libwnck/pager.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/libwnck/pager.c b/libwnck/pager.c
index 46e14eb..942c7a1 100644
--- a/libwnck/pager.c
+++ b/libwnck/pager.c
@@ -1927,11 +1927,15 @@ wnck_pager_motion (GtkWidget        *widget,
                                 pager->priv->drag_start_y,
                                 x, y))
     {
+      GtkTargetList *target_list;
       GdkDragContext *context;
-      context = gtk_drag_begin (widget,
-                               gtk_drag_dest_get_target_list (widget),
-                               GDK_ACTION_MOVE,
-                               1, (GdkEvent *)event);
+
+      target_list = gtk_drag_dest_get_target_list (widget);
+      context = gtk_drag_begin_with_coordinates (widget, target_list,
+                                                 GDK_ACTION_MOVE,
+                                                 1, (GdkEvent *) event,
+                                                 -1, -1);
+
       pager->priv->dragging = TRUE;
       pager->priv->prelight_dnd = TRUE;
       _wnck_window_set_as_drag_icon (pager->priv->drag_window,