lots of changes - please read as this may break your build

[Henrik Brautaset Aronsen]

Dirk Hohndel wrote:
> Just pushed a fix. We ended up referencing index -1 of an array.
>
> It is indeed quite interesting how resilient Linux is to stupid memory bugs. Mac OS X seems to be much more aggressive when it comes to failing. And that isn't necessarily a bad thing as it helps us find bugs.

The fix works great, thanks!

Aren't there some sort of automated checks that can be run to detect 
these kinds of errors?

Cheers,
Henrik
(Still not speaking C fluently.  Far from it.)