ws union member must have actual struct at start not pointer

Signed-off-by: Andy Green <andy.green@linaro.org>

changelog

@@ -10,6 +10,9 @@ Fixes
 get sent a content-length resulting in the link hanging until the peer closed
 it.  attack.sh updated to add a test for this.
 
+3) MINOR An error about hdr struct in _lws_ws_related is corrected, it's not
+known to affect anything until after it was fixed
+
 Changes
 -------
 

lib/private-libwebsockets.h

@@ -953,7 +953,7 @@ struct _lws_header_related {
 
 struct _lws_websocket_related {
 	/* cheapest way to deal with ah overlap with ws union transition */
-	struct _lws_header_related *hdr;
+	struct _lws_header_related hdr;
 	char *rx_ubuf;
 	unsigned int rx_ubuf_alloc;
 	struct lws *rx_draining_ext_list;