Flutterby™! : Writing intersection code and just put

Writing intersection code, and just put the divide outside the test for the position along the line against the denominator, so I could just do (t>=0 && t<=1), rather than having an additional sign check.

I feel so dirty, and like I need to hand in my graphics geek card.

(In other news, modern hardware and code only run on major user choices, baybee)