check_scramble_323 shuold ensure that the scramble has the correct length

sql/sql_acl.cc:
  cleanup

sql/password.c

@@ -218,6 +218,8 @@ check_scramble_323(const char *scrambled, const char *message,
   to=buff;
   for (pos=scrambled ; *pos ; pos++)
     *to++=(char) (floor(my_rnd(&rand_st)*31)+64);
+  if (pos-scrambled != SCRAMBLE_LENGTH_323)
+    return 1;
   extra=(char) (floor(my_rnd(&rand_st)*31));
   to=buff;
   while (*scrambled)

sql/sql_acl.cc

@@ -629,8 +629,8 @@ int acl_getroot(THD *thd, USER_RESOURCES  *mqh,
         if (passwd_len == acl_user_tmp->salt_len)
         {
           if (acl_user_tmp->salt_len == 0 ||
-              acl_user_tmp->salt_len == SCRAMBLE_LENGTH &&
-              check_scramble(passwd, thd->scramble, acl_user_tmp->salt) == 0 ||
+              (acl_user_tmp->salt_len == SCRAMBLE_LENGTH &&
+              check_scramble(passwd, thd->scramble, acl_user_tmp->salt) == 0) ||
               check_scramble_323(passwd, thd->scramble,
                                  (ulong *) acl_user_tmp->salt) == 0)
           {