Easy fix fan/temp OS6 issues on x86 legacy #no support

I also just updated a Pro6 for the first time from 4.2.x to 6.1.8 and have the fan problem. Note that this is not a false report, my fan is really going to zero RPM! There must be something wrong in the database that lets it go that low. The system temperature does start to rise, as expected without the fan running, and then the fan kicks back on. It appears that there is hysteresis built in to the speed control, which is good to prevent "motorboating". but maybe that's also a contributor to the problem. It looks very much like the fan is not capable of running at the slowest speed in the database, and so stops. But it isn't immediately cranked back up until it overcomes the programmed hysteresis. Or maybe it's a genuine physical hysteresis - the speed to which it is set after it stops isn't high enough to get it started, but is enough to keep it moving once started.