- numlaps 0 now sets the race to 0 laps.
- Players will finish upon crossing the finishing line
immediately after POSITION.
- gptest merged with numlaps.
- numlaps works in GP.
- Warping to sprint maps with numlaps already set now lets
numlaps exceed the map default. It was previous capped
at map default ONLY when loading into the level (so you
could still exceed it by setting numlaps during
POSITION). Now it's consistent.
- numlaps can now be set at any time during the race.
Instead of figuring out where it should be every tick while it's visible, store where it'll be at the start of the map.
Also moved finish line beam into a new file, k_race.c/h, for any Race-specific code.
A few unused variables for sprint map support later too
