Corrected the 1.0 = 0.99999 sigfig-equal bug.
Corrected the 1.0 = 0.99999 sigfig-equal bug.

These values were not reported equal because the 0.99999 was not be
rounded correctly. The current approach appears robust, but looks like
it could be simplified.

Bug found by Mirko Vukovic.

AccelerationNet/lisp-unit2