avformat/westwood_audenc: Remove unused variable

Reviewed-by: Zane van Iperen <zane@zanevaniperen.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavformat/westwood_audenc.c

@@ -73,7 +73,6 @@ static int wsaud_write_header(AVFormatContext *ctx)
     AVStream     *st = ctx->streams[0];
     AVIOContext  *pb = ctx->pb;
     AUDMuxContext *a = ctx->priv_data;
-    int ret;
     unsigned char flags = 0;
 
     a->uncomp_size = 0;