From 903156aa8a352a5df34cd1e34c21b2193a447d5e Mon Sep 17 00:00:00 2001
From: Karl Kiniger <karl.kiniger@med.ge.com>
Date: Sat, 11 Oct 2014 22:34:11 +0200
Subject: [PATCH] vf_drawtext: add missing clear of pointers after
 av_expr_free()

Fixes segfault when using sendcmd with drawtext.

Since LIBAVFILTER_VERSION_MAJOR 5 FF_API_DRAWTEXT_OLD_TIMELINE
evaluates to 0.

Signed-off-by: Karl Kiniger <karl.kiniger@med.ge.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavfilter/vf_drawtext.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c
index 4fbb6c08d6..5b725d69b0 100644
--- a/libavfilter/vf_drawtext.c
+++ b/libavfilter/vf_drawtext.c
@@ -716,6 +716,8 @@ static av_cold void uninit(AVFilterContext *ctx)
 #if FF_API_DRAWTEXT_OLD_TIMELINE
     av_expr_free(s->draw_pexpr);
     s->x_pexpr = s->y_pexpr = s->draw_pexpr = NULL;
+#else
+    s->x_pexpr = s->y_pexpr = NULL;
 #endif
     av_freep(&s->positions);
     s->nb_positions = 0;