Color calibration: disable Yxy <-> XYZ roundtrip if no gamut compression is requested #9257
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The conversion to Yxy will produce division by zero and all sorts of oddities if colors are out of gamut, even when no clipping and no gamut compression are required. In that case, we entirely remove the roundtrip, leaving only the channel mixing.
Notice it will fix the black pixels but will still result in RGB clipping at some point, meaning wrong colors anyway.
fix #9076