[argyllcms] V1.1.0 RC1 targen can't do OFPS with -m -s or -g keys

When I choose any of -m, -s or -g parameters for targen OFPS, the targen can't 
place points till the end. It slows down gradually and after 3 hours have 
complete only 235 points from 779.
Try

targen -v -d4 -f782 -s16 -w test

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