swresample: replace 2 av_free() by av_freep()

avoids leaving stale pointers in memory

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 1 insertions, 1 deletions

diff --git a/libswresample/swresample.c b/libswresample/swresample.c
index cdfe5bfee5..b9a3c3d90e 100644
--- a/libswresample/swresample.c
+++ b/libswresample/swresample.c
@@ -468,7 +468,7 @@ int swri_realloc_audio(AudioData *a, int count){
         if(a->planar) memcpy(a->ch[i], old.ch[i], a->count*a->bps);
     }
     if(!a->planar) memcpy(a->ch[0], old.ch[0], a->count*a->ch_count*a->bps);
-    av_free(old.data);
+    av_freep(&old.data);
     a->count= count;
 
     return 1;