From c72a7b32a1e266debd7aff9f5712965c18a86fd2 Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Fri, 18 Oct 2024 12:57:28 +0100
Subject: [PATCH] Contiki: Fix heapmem_free() warning

heapmem_free() warns if ptr is NULL.
---
 src/coap_mem.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/coap_mem.c b/src/coap_mem.c
index a1a524a86d..c8e463d274 100644
--- a/src/coap_mem.c
+++ b/src/coap_mem.c
@@ -654,7 +654,8 @@ coap_free_type(coap_memory_tag_t type, void *ptr) {
   if (ptr)
     track_counts[type]--;
 #endif /* COAP_MEMORY_TYPE_TRACK */
-  heapmem_free(ptr);
+  if (ptr)
+    heapmem_free(ptr);
 }
 
 #endif /* WITH_CONTIKI */