context only destroy protocols if init got sent

If for some reason we exit before the protocol init action
(which is delayed for libuv) we should not send the protocol
destroy messages

Signed-off-by: Andy Green <andy@warmcat.com>

lib/context.c

@@ -703,7 +703,7 @@ lws_context_destroy(struct lws_context *context)
 {
 	const struct lws_protocols *protocol = NULL;
 	struct lws_context_per_thread *pt;
-	struct lws_vhost *vh, *vh1;
+	struct lws_vhost *vh = NULL, *vh1;
 	struct lws wsi;
 	int n, m;
 
@@ -754,7 +754,8 @@ lws_context_destroy(struct lws_context *context)
 	 *
 	 * We can't free things until after the event loop shuts down.
 	 */
-	vh = context->vhost_list;
+	if (context->protocol_init_done)
+		vh = context->vhost_list;
 	while (vh) {
 		wsi.vhost = vh;
 		protocol = vh->protocols;