From 56f2bc6f3e65e15f0b3ca50f59a2104fd30d8e99 Mon Sep 17 00:00:00 2001
From: Max Bruckner <max@maxbruckner.de>
Date: Tue, 27 Jun 2017 22:58:25 +0200
Subject: [PATCH] handle null pointers: cJSON_PrintPreallocated

---
 cJSON.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cJSON.c b/cJSON.c
index 16acd42..80d35db 100644
--- a/cJSON.c
+++ b/cJSON.c
@@ -1122,7 +1122,7 @@ CJSON_PUBLIC(cJSON_bool) cJSON_PrintPreallocated(cJSON *item, char *buf, const i
 {
     printbuffer p = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } };
 
-    if (len < 0)
+    if ((len < 0) || (buf == NULL))
     {
         return false;
     }