codec_desc: mark PCM A-law/mu-law lossy

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

libavcodec/codec_desc.c

@@ -1376,12 +1376,14 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .type      = AVMEDIA_TYPE_AUDIO,
         .name      = "pcm_mulaw",
         .long_name = NULL_IF_CONFIG_SMALL("PCM mu-law / G.711 mu-law"),
+        .props     = AV_CODEC_PROP_LOSSY,
     },
     {
         .id        = AV_CODEC_ID_PCM_ALAW,
         .type      = AVMEDIA_TYPE_AUDIO,
         .name      = "pcm_alaw",
         .long_name = NULL_IF_CONFIG_SMALL("PCM A-law / G.711 A-law"),
+        .props     = AV_CODEC_PROP_LOSSY,
     },
     {
         .id        = AV_CODEC_ID_PCM_S32LE,