noip.c: Fix memset length error.

Reported by Ian Jackson; thanks.

diff --git a/noip.c b/noip.c
index 72baaee..5ccc9e2 100644 (file)
--- a/noip.c
+++ b/noip.c
@@ -353,7 +353,7 @@ static void wildcard_address(int af, struct sockaddr *sa)
     } break;
     case AF_INET6: {
       struct sockaddr_in6 *sin6 = SIN6(sa);
-      memset(sin6, 0, sizeof(sin6));
+      memset(sin6, 0, sizeof(*sin6));
       sin6->sin6_family = AF_INET6;
       sin6->sin6_port = 0;
       sin6->sin6_addr = in6addr_any;