[gtk+] x11: Fix managed dnd

[Matthias Clasen <matthiasc src gnome org>]

commit 95ae7b7c1e7a0f49893785998fbfa38aa98835f3
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Aug 26 22:13:25 2017 -0400

    x11: Fix managed dnd
    
    We need to actually trigger the drop from the gdk side.

 gdk/x11/gdkdnd-x11.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/x11/gdkdnd-x11.c b/gdk/x11/gdkdnd-x11.c
index 8acf7be..03812d6 100644
--- a/gdk/x11/gdkdnd-x11.c
+++ b/gdk/x11/gdkdnd-x11.c
@@ -2855,6 +2855,7 @@ static void
 gdk_x11_drag_context_drop_performed (GdkDragContext *context,
                                      guint32         time_)
 {
+  gdk_drag_drop (context, time_);
   drag_context_ungrab (context);
 }