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/sapenc.c b/libavformat/sapenc.c
index f9afab0c33..dc1c210408 100644
--- a/libavformat/sapenc.c
+++ b/libavformat/sapenc.c
@@ -60,8 +60,7 @@ static int sap_write_close(AVFormatContext *s)
     }
 
     av_freep(&sap->ann);
-    if (sap->ann_fd)
-        ffurl_close(sap->ann_fd);
+    ffurl_closep(&sap->ann_fd);
     ff_network_close();
     return 0;
 }