By now, it has become clear that this the norm rather than the
exception among these units. Thankfully!
Part of P0245, funded by [Anonymous], Blue Bolt, Ember2528, and Yanga.
Unfortunately, it's still premature to start a separate header file for
display-space coordinates like I'm doing with Shuusou Gyoku. What does
make sense, though, is moving the display-space vector types next to
the display-space scalar types in `pc98.h`. This makes much more sense
than keeping them in `master.hpp` just because master.lib also has a
Point type. Would have thought that this lets us remove more than two
`master.hpp` inclusions, though…
Part of P0240, funded by JonathKane.
The .PTN functions, vector functions, and egc_copy_rect_1_to_0_1()
(finally!) from TH01, as well as playfld.hpp from all games(finally!),
together with a bunch of other functions in their vicinity.
Part of P0201, funded by Ember2528 and Yanga.
nmlgc