change prototype. We're stuffing a binary array in here not shorts.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>

Index: libpayload/include/libpayload.h
===================================================================
--- libpayload/include/libpayload.h	(revision 3488)
+++ libpayload/include/libpayload.h	(working copy)
@@ -154,7 +154,7 @@
 int toupper(int c);
 
 /* libc/ipchecksum.c */
-unsigned short ipchksum(const unsigned short *ptr, unsigned long nbytes);
+unsigned short ipchksum(const void *ptr, unsigned long nbytes);
 
 /* libc/malloc.c */
 void free(void *ptr);
Index: libpayload/libc/ipchecksum.c
===================================================================
--- libpayload/libc/ipchecksum.c	(revision 3488)
+++ libpayload/libc/ipchecksum.c	(working copy)
@@ -4,6 +4,7 @@
  * It has originally been taken from the FreeBSD project.
  *
  * Copyright (c) 2001 Charles Mott <cm@linktel.net>
+ * Copyright (c) 2008 coresystems GmbH
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -30,9 +31,10 @@
 
 #include <libpayload.h>
 
-unsigned short ipchksum(const unsigned short *ptr, unsigned long nbytes)
+unsigned short ipchksum(const void *vptr, unsigned long nbytes)
 {
 	int sum, oddbyte;
+	const unsigned short *ptr = vptr;
 
 	sum = 0;
 	while (nbytes > 1) {
