net: fix windows build

R=golang-dev
CC=golang-dev
https://golang.org/cl/4873058

diff --git a/src/pkg/syscall/ztypes_windows.go b/src/pkg/syscall/ztypes_windows.go
index 07f2b85f07702f09fec232cf5884af81d399c54b..728812b8438d4af547ba5601c029c1c662e19f18 100644 (file)
--- a/src/pkg/syscall/ztypes_windows.go
+++ b/src/pkg/syscall/ztypes_windows.go
@@ -359,6 +359,9 @@ const (
 
        WSADESCRIPTION_LEN = 256
        WSASYS_STATUS_LEN  = 128
+
+       IPV6_JOIN_GROUP  = 12
+       IPV6_LEAVE_GROUP = 13
 )
 
 type WSABuf struct {