server: Avoid leaking the ifaddrs structure in bind_to_interface().

Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

server/sock.c

@@ -1844,6 +1844,8 @@ static int bind_to_interface( struct sock *sock, const struct sockaddr_in *addr
             return 1;
         }
     }
+
+    freeifaddrs( ifaddrs );
     return 0;
 }