udp: Fix signedness warning on 32-bits architectures

When a ssize_t is an int:

udp.c: In function ‘udp_sock_handler’:
udp.c:774:23: warning: comparison of integer expressions of different signedness: ‘unsigned int’ and ‘ssize_t’ {aka ‘int’} [-Wsign-compare]
  774 |         for (i = 0; i < n; i += m) {
      |                       ^
udp.c:781:43: warning: comparison of integer expressions of different signedness: ‘unsigned int’ and ‘ssize_t’ {aka ‘int’} [-Wsign-compare]
  781 |                         for (m = 1; i + m < n; m++) {
      |

Change 'i' and 'm' counters in udp_sock_handler() to signed versions,
to match ssize_t n.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 1 insertions, 1 deletions

diff --git a/udp.c b/udp.c
index 20a9ea0..b7cbfdc 100644
--- a/udp.c
+++ b/udp.c
@@ -754,7 +754,7 @@ void udp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
 	in_port_t dstport = ref.r.p.udp.udp.port;
 	bool v6 = ref.r.p.udp.udp.v6;
 	struct mmsghdr *mmh_recv;
-	unsigned int i, m;
+	int i, m;
 
 	if (!(events & EPOLLIN))
 		return;