frwu: lowercase the FRWU codec name

This is more consistent with all the other codec names.
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Diego Biurrun <diego@biurrun.de>

libavcodec/frwu.c

@@ -27,7 +27,7 @@
 static av_cold int decode_init(AVCodecContext *avctx)
 {
     if (avctx->width & 1) {
-        av_log(avctx, AV_LOG_ERROR, "FRWU needs even width\n");
+        av_log(avctx, AV_LOG_ERROR, "frwu needs even width\n");
         return AVERROR(EINVAL);
     }
     avctx->pix_fmt = PIX_FMT_UYVY422;
@@ -114,7 +114,7 @@ static av_cold int decode_close(AVCodecContext *avctx)
 }
 
 AVCodec ff_frwu_decoder = {
-    .name           = "FRWU",
+    .name           = "frwu",
     .type           = AVMEDIA_TYPE_VIDEO,
     .id             = CODEC_ID_FRWU,
     .init           = decode_init,