rollin' back my silly hack (
rea4d1fe665d7 )
Fix preview of ruler map. Thanks to Randy for pointing out it was incorrect.
Remove some unused variables and options.inc which uFloat doesn't use, probably should never use, and was getting in the way of my testcase - but most importantly, remove the inline on hwSqrt which was causing very bad math on my compiler/machine. We may have to remove more inlining. A pity.