Remove trailing whitespace

Change-Id: I8e24f95a88bef3a59006a89c219871e6156963d7
diff --git a/ggsn/ggsn.c b/ggsn/ggsn.c
index 6c5c1a8..67d040f 100644
--- a/ggsn/ggsn.c
+++ b/ggsn/ggsn.c
@@ -1,13 +1,13 @@
-/* 
+/*
  * OsmoGGSN - Gateway GPRS Support Node
  * Copyright (C) 2002, 2003, 2004 Mondru AB.
  * Copyright (C) 2017 by Harald Welte <laforge@gnumonks.org>
- * 
+ *
  * The contents of this file may be used under the terms of the GNU
  * General Public License Version 2, provided that the above copyright
  * notice and this permission notice is included in all copies or
  * substantial portions of the software.
- * 
+ *
  */
 
 /* ggsn.c