ws2_32: Fix FreeBSD compiling issue on ipx address structure

[Bruno Jesus]

Manually tested on PC-BSD which also shows the issue.
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diff --git a/dlls/ws2_32/socket.c b/dlls/ws2_32/socket.c
index 0391554..12838da 100644
--- a/dlls/ws2_32/socket.c
+++ b/dlls/ws2_32/socket.c
@@ -1473,7 +1473,9 @@ static BOOL is_sockaddr_bound(const struct sockaddr *uaddr, int uaddrlen)
         {
             static const struct sockaddr_ipx emptyAddr;
             struct sockaddr_ipx *ipx = (struct sockaddr_ipx*) uaddr;
-            return ipx->sipx_port || ipx->sipx_network || memcmp(&ipx->sipx_node, &emptyAddr.sipx_node, sizeof(emptyAddr.sipx_node));
+            return ipx->sipx_port
+            || memcmp(&ipx->sipx_network, &emptyAddr.sipx_network, sizeof(emptyAddr.sipx_network))
+            || memcmp(&ipx->sipx_node, &emptyAddr.sipx_node, sizeof(emptyAddr.sipx_node));
         }
 #endif
         case AF_INET6: