From b6dc4e57802abca09f011109daf9b4850b3671a5 Mon Sep 17 00:00:00 2001
From: "Roger A. Light" <roger@atchoo.org>
Date: Tue, 12 Feb 2019 11:34:13 +0000
Subject: [PATCH] Fix datatype_read test.

---
 lib/packet_datatypes.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/packet_datatypes.c b/lib/packet_datatypes.c
index 41dd9d94..335cb9f0 100644
--- a/lib/packet_datatypes.c
+++ b/lib/packet_datatypes.c
@@ -130,6 +130,7 @@ int packet__read_string(struct mosquitto__packet *packet, char **str, int *lengt
 	if(mosquitto_validate_utf8(*str, *length)){
 		mosquitto__free(*str);
 		*str = NULL;
+		*length = -1;
 		return MOSQ_ERR_MALFORMED_UTF8;
 	}