Lol, "registerbgidriver". Just because the original function is nothing but a
wrapper around free(), and registerbgidriver() is also just a wrapper around
registerfarbgidriver().
Wow, what a slice. Lots of code, and it comes with its own data declarations
inside the code segment! Since all these functions were originally contained
in one code file, it makes sense to do all 13 in one commit. This removes all
erroneous references to the 'NULL CHECK' string.
[Binary change] This also changes some relocations in TH01's REIIDEN.EXE.