[APBeta] Interesting find

[Paul Rodman]

On Friday I spent most of the day trying to figure out why the code to  
draw Saturn in the FOV was causing reproducible hard crashes on  
Windows (fine on Mac OS). Eventually by simplifying the (rather  
complex math) code and spreading it out over a number of separate  
routines, I was able to get it to work.

This is rather disturbing. It would appear to be either a compiler bug  
with complex math expressions or some kind of undetected stack  
overflow problem. I'm not sure what.

The app is still unstable (i.e. it "randomly" hard crashes), and now  
I'm wondering if it has to do with other math code that gets executed  
occasionally (e.g. moon/sun position, etc.). This is turning me  
prematurely grey. I'll have a look at other bits of "nasty" code this  
week and see if I can do the same with them, in the hope that it will  
resolve the problems.

Note: this code is virtually unchanged from that in V1.6, which makes  
me suspect the compiler.

Paul R.