lavc/codec_desc: SMPTE 302M is not lossy

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/codec_desc.c

@@ -1595,7 +1595,7 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .type      = AVMEDIA_TYPE_AUDIO,
         .name      = "s302m",
         .long_name = NULL_IF_CONFIG_SMALL("SMPTE 302M"),
-        .props     = AV_CODEC_PROP_LOSSY,
+        .props     = AV_CODEC_PROP_LOSSLESS,
     },
     {
         .id        = AV_CODEC_ID_PCM_S8_PLANAR,