avformat/dashenc: URL close unconditionally after DELETE segments

Fixes bug with HTTP DELETE when HTTP Persistent is ON.
Right now, HTTP Persistent connections is supported only for POSTs and PUTs.
HTTP DELETE will still open a new connection every time.

libavformat/dashenc.c

@@ -1253,7 +1253,7 @@ static void dashenc_delete_file(AVFormatContext *s, char *filename) {
         }
 
         av_dict_free(&http_opts);
-        dashenc_io_close(s, &out, filename);
+        ff_format_io_close(s, &out);
     } else if (unlink(filename) < 0) {
         av_log(s, AV_LOG_ERROR, "failed to delete %s: %s\n", filename, strerror(errno));
     }