Use const char * and an unsigned int in ssh_crc32().

git-svn-id: svn+ssh://svn.berlios.de/svnroot/repos/libssh/trunk@723 7dcaeef0-15fb-0310-b436-a5af3365683c

include/libssh/priv.h

@@ -660,7 +660,7 @@ CRYPTO *crypto_new(void);
 void crypto_free(CRYPTO *crypto);
 
 /* crc32.c */
-u32 ssh_crc32(char *buffer, int len);
+u32 ssh_crc32(const char *buf, u32 len);
 
 /* auth1.c */
 int ssh_userauth1_none(SSH_SESSION *session, const char *username);

libssh/crc32.c

@@ -80,13 +80,14 @@ static u32 crc_table[] = {
   0x2d02ef8dUL
 };
 
-u32 ssh_crc32(char *buf, int len) {
+u32 ssh_crc32(const char *buf, u32 len) {
   u32 ret = 0;
   while(len > 0) {
     ret = crc_table[(ret ^ *buf) & 0xff] ^ (ret >> 8);
     --len;
     ++buf;
   }
+
   return ret;
 }