Increase precision of dot bounds check in EGP:DrawPath

[Denneisk]

Fixes a bug with EGP CircleOutlines where the dot product could be >0.999 and <=1, causing the function to skip calculating every segment but the last.

As far as I can tell, having these so imprecise isn't actually necessary.

[thegrb93]

Can you change the comparators to >= and <=? Also move the local scaling calculation?

if dot >= 1 then
    ...
elseif dot <= -1 then
    ...
else
    local scaling = size*math.tan(math.acos(dot)/2)
    if dir.x*-lastdir.y + dir.y*lastdir.x > 0 then
        ...
    else
        ...
    end
end

[Denneisk]

The function works fine at +/-1 but I'll oblige in case there's some weird precision issue.

[thegrb93]

The function works fine at +/-1 but I'll oblige in case there's some weird precision issue.

It's supposed to take the simpler branch though as an optimization.