Variable below zero but if statement doesn't grab?

[jkpl via Digitalmars-d-learn]

On Sunday, 27 December 2015 at 16:00:34 UTC, jkpl wrote:
> On Sunday, 27 December 2015 at 15:53:55 UTC, TheDGuy wrote:
>> Any idea what i am doing wrong?
>> https://www.youtube.com/watch?v=j_VCa-5VeP8
>
> You could post the code also, personnaly I'm always almost at 2 
> meters from my screen, with zoom, so I can't read the code...

I work more or less lying on a futon. Desks are so cheesy...