Cast away a warning.
We've already ensured that len is > 0; just cast it to u_int.
diff --git a/pcap-netfilter-linux.c b/pcap-netfilter-linux.c
index 8589955..52ee7dc 100644
--- a/pcap-netfilter-linux.c
+++ b/pcap-netfilter-linux.c
@@ -375,7 +375,7 @@
if (snl.nl_pid != 0 || seq_id != nlh->nlmsg_seq) /* if not from kernel or wrong sequence skip */
continue;
- while ((u_int)len >= NLMSG_SPACE(0) && NLMSG_OK(nlh, len)) {
+ while ((u_int)len >= NLMSG_SPACE(0) && NLMSG_OK(nlh, (u_int)len)) {
if (nlh->nlmsg_type == NLMSG_ERROR || (nlh->nlmsg_type == NLMSG_DONE && nlh->nlmsg_flags & NLM_F_MULTI)) {
if (nlh->nlmsg_len < NLMSG_ALIGN(sizeof(struct nlmsgerr))) {
errno = EBADMSG;
