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/tls_schannel.c b/libavformat/tls_schannel.c
index fec43ffafd..4bfaa85228 100644
--- a/libavformat/tls_schannel.c
+++ b/libavformat/tls_schannel.c
@@ -138,8 +138,7 @@ static int tls_close(URLContext *h)
     av_freep(&c->dec_buf);
     c->dec_buf_size = c->dec_buf_offset = 0;
 
-    if (c->tls_shared.tcp)
-        ffurl_close(c->tls_shared.tcp);
+    ffurl_closep(&c->tls_shared.tcp);
     return 0;
 }