--- libaitcrc/src/pelco.c	2011/04/28 20:28:20	1.3
+++ libaitcrc/src/pelco.c	2012/07/04 14:53:43	1.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: pelco.c,v 1.3 2011/04/28 20:28:20 misho Exp $
+* $Id: pelco.c,v 1.4 2012/07/04 14:53:43 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -12,7 +12,7 @@ terms:
 All of the documentation and software included in the ELWIX and AITNET
 Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
 
-Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
 	by Michael Pounov <misho@elwix.org>.  All rights reserved.
 
 Redistribution and use in source and binary forms, with or without
@@ -47,16 +47,20 @@ SUCH DAMAGE.
 
 
 /*
- * crcPelco() Calculate Pelco D/P CRC
+ * crcPelco() - Calculate Pelco D/P CRC
+ *
  * @ver = Pelco protocol version (Dd | Pp)
  * @pkt = Packet for calculate crc
- * return: crc for packet, if is 0 check and crc_GetErrno() == 1 
+ * return: crc for packet, if is 0 check and crc_GetErrno() == EINVAL
  	Pelco protocol not supported
  */
-inline u_char crcPelco(u_char ver, u_char *pkt)
+inline u_char
+crcPelco(u_char ver, u_char *pkt)
 {
 	register u_char i, crc;
 
+	assert(pkt);
+
 	switch (ver) {
 		case 'D':
 		case 'd':
@@ -69,7 +73,7 @@ inline u_char crcPelco(u_char ver, u_char *pkt)
 			break;
 		default:
 			crc = 0;
-			crcSetErr(1, "crcAdler(): Invalid parameters!");
+			crc_SetErr(EINVAL, "Invalid parameters!");
 	}
 
 	return crc;