lavu/tx: reset subcontext pointer if initialization fails

Thanks to mkver for pointing this out.

1 files changed, 1 insertions, 1 deletions

diff --git a/libavutil/tx.c b/libavutil/tx.c
index a299408ed4..a90ccffcc4 100644
--- a/libavutil/tx.c
+++ b/libavutil/tx.c
@@ -606,7 +606,7 @@ av_cold int ff_tx_init_subtx(AVTXContext *s, enum AVTXType type,
             break;
     }
 
-    av_free(sub);
+    av_freep(&s->sub);
 
 end:
     av_free(cd_matches);