Maker note tag 0x4001 is UNDEFINED bytes (ColorData versions -3 and -4) on
PowerShot and EOS M bodies. It was read as one number per byte, so no plausible
as-shot levels were found and the white balance was 1, 1, 1 (green cast, a* about
-13 on neutrals). Byte and undefined data is now paired into 16-bit words in the
maker note's byte order before the existing probe (word 71). No per-model table.
RENDER_CACHE_VERSION 11 -> 12.
radialmonster
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