misc: Once again go from "On Waves" to "On-Waves"..

Try to get the company name of our sponsor right...
diff --git a/openbsc/src/gprs/sgsn_main.c b/openbsc/src/gprs/sgsn_main.c
index e9dac8b..c63a476 100644
--- a/openbsc/src/gprs/sgsn_main.c
+++ b/openbsc/src/gprs/sgsn_main.c
@@ -1,7 +1,7 @@
 /* GPRS SGSN Implementation */
 
 /* (C) 2010 by Harald Welte <laforge@gnumonks.org>
- * (C) 2010 by On Waves
+ * (C) 2010 by On-Waves
  * All Rights Reserved
  *
  * This program is free software; you can redistribute it and/or modify