[gnome-panel] panel-addto-dialog: add missing include

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 5075fde15b52b6c6d1faef71cc283c60ed4cb448
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Dec 19 01:33:58 2016 +0200

    panel-addto-dialog: add missing include

 gnome-panel/panel-addto-dialog.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gnome-panel/panel-addto-dialog.c b/gnome-panel/panel-addto-dialog.c
index 3b38ff5..d630926 100644
--- a/gnome-panel/panel-addto-dialog.c
+++ b/gnome-panel/panel-addto-dialog.c
@@ -24,6 +24,7 @@
 #include <string.h>
 
 #include <glib/gi18n.h>
+#include <gdk/gdkx.h>
 
 #include <gmenu-tree.h>