avformat: Replace ffurl_close() by ffurl_closep() where appropriate

It avoids leaving dangling pointers behind in memory.

Also remove redundant checks for whether the URLContext to be closed is
already NULL.

Reviewed-by: Anton Khirnov <anton@khirnov.net>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/libavformat/srtpproto.c b/libavformat/srtpproto.c
index 5e6e5164d7..13e2245015 100644
--- a/libavformat/srtpproto.c
+++ b/libavformat/srtpproto.c
@@ -59,8 +59,7 @@ static int srtp_close(URLContext *h)
     SRTPProtoContext *s = h->priv_data;
     ff_srtp_free(&s->srtp_out);
     ff_srtp_free(&s->srtp_in);
-    ffurl_close(s->rtp_hd);
-    s->rtp_hd = NULL;
+    ffurl_closep(&s->rtp_hd);
     return 0;
 }