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.
Yup, unaligned! The prefilling case is quite broken on T98-Next, but
given that this emulator hasn't seen any development since 2010 and
every other emulator gets it right, we can reasonably assume that to be
a bug in that emulator.
Completes P0232, funded by [Anonymous].
nmlgc