From 69286f8cf93aeaa57f9dab2f1e3b797d73a0975a Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Date: Thu, 8 Oct 2020 15:40:02 +0200
Subject: [PATCH] avformat/dashdec: Reset pointer to NULL after freeing it

This is currently safe here, because the effective lifetime of
adaptionset_lang is parse_manifest_adaptationset() (i.e. the pointer
gets overwritten each time on entry to the function and gets freed
before exiting the function), but it is nevertheless safer to reset the
pointer.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
(cherry picked from commit 616eb93a404c088635be74498ddb04072dfe1b90)
---
 libavformat/dashdec.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c
index 8a4ec9b560..a8a3b76987 100644
--- a/libavformat/dashdec.c
+++ b/libavformat/dashdec.c
@@ -1156,6 +1156,7 @@ static int parse_manifest_adaptationset(AVFormatContext *s, const char *url,
 
 err:
     xmlFree(c->adaptionset_lang);
+    c->adaptionset_lang = NULL;
     return ret;
 }