* Shield Drop...
* Whatever you've got orbiting or trailing you, DROP THEM WHERE THEY STAND. (Except for the ghost sink. That one's OK.)
* Pops your Thunder Shield.
* Happens upon ANY hit, except for deathpits.
* HUD Drop...
* Also does the above, except for the Thunder Shield thing.
* If there's any item left in your item box, pop it out as a little hovering, rotating Minecraft item!
* You can pick up the Minecraft item by driving over it if your item box is sufficiently empty, or the item which is contained within it is of the same type.
* Happens upon Size Down and battle elimination.
* Can also be forced on with `cv_kartdebughuddrop on`!
* Some other random stuff.
* Fix a bunch of `a->scale = b`'s into `P_SetScale(a, b)` form, for maximum validity.
* Make K_CleanHnextList and K_UpdateHnextList one function, since they only differed by one continue clause (and the type of their input parameter).
* Allow shrunken players to pick up item boxes again.
* Fix MF_NOCLIPTHING. (Gonna pass this fix to vanilla when I get the chance, too.)
* Break NiGHTS a little through my machinations.
A lot more similar to the code used for player wall bumping, and is much less likely for you to just... pass through the object if you keep trying hard enough.
Also, falling rocks get pushed aside by invinicible players with no resistance.
Sink shield that makes it double-press to use, gives the trailing item slowdown, and shows other people that you have it, but doesn't have any collision
- different min/max on capped spring pads
- turn the normally almost-useless "non-ramp sector" type into "wall sector", which disables both stepup AND stepdown instead of just stepdown
Less grow, less invinc, less ballhog, just a teensy bit less triple orbinaut, and SPB odds no longer scale with lower player counts like other power items do
* They're clearly not quick enough at the job, since it causes a bunch of silly race conditions.
* Instead, K_UpdateHnextList and K_CleanHnextList are in charge of removing them, which are called in the circumstances itemamount (and itemheld/eggmanheld) is changed.
* Also, tweak a few places so that trailers AND orbiters can use the same system.
Also, some minor thingies.
* Turn all the useless ```if (a) { A } else if (!a) { B }``` bullshit into ```if (a) { A } else { B }``` bullshit.
* Fix up some minor inaccuracies in the playerarrow stuff that doesn't result in creating more sprites.
While I cannot guarantee the class of glitches that allows for additional items to be thrown/dropped has been completely obliterated, this DOES prevent the class of exploits that allows for "infinite items" (really just negative quantities not completely bounds-checked for).
* Flashing Eggman-hit players.
* Fix typo with Rocket Shoe item bar, and make it extensible for potential future purposes since I was fiddling with it anyways.
* More complete playerarrow visuals for various items.
* Eggman fake (and debug) item get sounds.
