short flags; /**< flag bits */
char sum2[SUM_LENGTH]; /**< checksum */
};
---- old/sender.c
-+++ new/sender.c
-@@ -92,6 +92,7 @@ static struct sum_struct *receive_sums(i
-
- s->sums[i].offset = offset;
- s->sums[i].flags = 0;
-+ s->sums[i].chain = -1;
-
- if (i == s->count-1 && s->remainder != 0)
- s->sums[i].len = s->remainder;