avformat/sccdec: Avoid variable that is always zero

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavformat/sccdec.c

@@ -65,7 +65,6 @@ static int scc_read_header(AVFormatContext *s)
     AVStream *st = avformat_new_stream(s, NULL);
     char line2[4096], line[4096];
     int64_t pos, ts, next_ts = AV_NOPTS_VALUE;
-    int ret = 0;
     ptrdiff_t len;
     uint8_t out[4096];
     FFTextReader tr;
@@ -175,7 +174,7 @@ static int scc_read_header(AVFormatContext *s)
 
     ff_subtitles_queue_finalize(s, &scc->q);
 
-    return ret;
+    return 0;
 fail:
     ff_subtitles_queue_clean(&scc->q);
     return AVERROR(ENOMEM);