fix header include

stddef.h is needed to have offsetof macros on windows (at least)

diff --git a/ext/sockets/sockets.c b/ext/sockets/sockets.c
index b226d94715d1d6ff8d9334679ab5d570bd2f9694..4a2a41b5fd8303651a1db9319c5c4e33e1ce7278 100644 (file)
--- a/ext/sockets/sockets.c
+++ b/ext/sockets/sockets.c
@@ -64,6 +64,8 @@
 # endif
 #endif
 
+#include <stddef.h>
+
 #include "sockaddr_conv.h"
 #include "multicast.h"
 #include "sendrecvmsg.h"