udp.c: Add a comment about the salen cast

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/udp.c b/udp.c
index ee38d51587eb02f56ec47ea98cb5ec0db3982173..0d945acdb4df07d6f4645262154c042a502af358 100644 (file)
--- a/udp.c
+++ b/udp.c
@@ -269,7 +269,8 @@ static bool_t record_socket_gotaddr(struct udpcommon *uc, struct udpsock *us,
     socklen_t salen=sizeof(us->addr);
     int r=getsockname(us->fd,&us->addr.sa,&salen);
     if (r) FAIL("getsockname()");
-    if ((size_t)salen>sizeof(us->addr)) { errno=0; FAIL("getsockname() length"); }
+    if ((size_t)salen>sizeof(us->addr)) /* cast squashes clang warning */
+      { errno=0; FAIL("getsockname() length"); }
     return True;
 
  failed: