--- src/sbin/hammer/hammer_util.h	2008/06/26 04:07:57	1.18
+++ src/sbin/hammer/hammer_util.h	2008/07/10 04:44:58	1.19
@@ -107,6 +107,7 @@ extern int RootVolNo;
 extern struct volume_list VolList;
 
 uint32_t crc32(const void *buf, size_t size);
+uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
 
 struct volume_info *setup_volume(int32_t vol_no, const char *filename,
 				int isnew, int oflags);