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Number of colors in bitmap thumbnail

Submitted by konradm on

Hi,

I noticed that for .dng files with bitmap thumbnail LibRaw claims that there is no color in the preview (thumbnail.tcolors = 0 after open_file() + unpack_thumb()).
Shouldn't it return 3 colors (tcolors = 3) as from documentation LIBRAW_THUMBNAIL_BITMAP preview contains RGB bitmap?

Example files:
https://drive.google.com/open?id=0B6ENEUKTZp-LUmk5MHliWl9NSlk
https://drive.google.com/open?id=0B6ENEUKTZp-LaW1WN0R4X25UX3M

Thank you,
Konrad

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