From 29c5c8fdfb4f7c3fe22260d73e9ade7e54330a7d Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Date: Mon, 14 Sep 2020 01:56:44 +0200
Subject: [PATCH] avcodec/cngenc: Replace av_free() by av_freep() in close
 function

This avoids leaving pointers to already freed memory in memory.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
---
 libavcodec/cngenc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/cngenc.c b/libavcodec/cngenc.c
index e185c4a40a..8f23b7555a 100644
--- a/libavcodec/cngenc.c
+++ b/libavcodec/cngenc.c
@@ -37,8 +37,8 @@ static av_cold int cng_encode_close(AVCodecContext *avctx)
 {
     CNGContext *p = avctx->priv_data;
     ff_lpc_end(&p->lpc);
-    av_free(p->samples32);
-    av_free(p->ref_coef);
+    av_freep(&p->samples32);
+    av_freep(&p->ref_coef);
     return 0;
 }