The C++ standard library comes with perfectly fine implementations of
these functions, so there's no point in reimplementing them just for the
hell of it.
Several rendering changes have resulted in a non-rendering build that
failed to build from source. Dummy out all of these functions to make it
work again.
* intermediate fade triangles are now calculated in C4FoWLight
* rendering takes also place in C4FoWLight, using different C4FoWDrawStrategies
* solved an old TODO from Peter (int -> int32_t)
* refactor and simplify portions of the light vertex calculation code