OK, this is the big one. We still keep using `#include` guards only
where we absolutely need to, but with each header now being valid in
isolation, this can now actually help *minimize* the length of each
translation unit's `#include` list. Turns out that after removing all
the duplicates, we only *actually* need to guard 29 headers across all
5 games.
Part of P0285, funded by [Anonymous] and iruleatgames.
Once we decompile whatever can be decompiled of those, we're going to
use the same coordinate constants for both these and the backdrop
image. Ideally, we can even macro (or inline-function) away the entire
implementation, so that the redundancy between TH04's and TH05's Stage
4 bosses won't matter as much.
Part of P0189, funded by Arandui and Lmocinemod.
With TH04's version hardcoding not only Gengetsu's dialog and
initialization, but also the Bad Ending after having clearing Stage 5
with continues or on Easy difficulty.
Part of P0188, funded by [Anonymous] and nrook.
nmlgc