WAV: support wma2 in wav

Close #4829

modules/demux/wav.c

@@ -343,6 +343,7 @@ static int Open( vlc_object_t * p_this )
     case VLC_CODEC_TRUESPEECH:
     case VLC_CODEC_ATRAC3:
     case VLC_CODEC_G723_1:
+    case VLC_CODEC_WMA2:
         if( FrameInfo_MSGSM( &p_sys->i_frame_size, &p_sys->i_frame_samples,
                              &p_sys->fmt ) )
             goto error;