Avoid build warning about use of deprecated /Gm option.

These global variables weren't actually used for any purpose.

Reverts gen_defs/genwrap craziness.

Fixes issue closing SyncTERM in curses mode on macOS.

The issue was that the various semaphores and mutexes weren't being
initialized at all when sdl_initconio() wasn't called... so starting
the event thread and telling it to stop would access uncreated
semaphores and mutexes.

Split out the init, and be sure to call it before exiting.

1) Use static SDL since it's required by both conio and XPDev
2) Since the SDL thread will always run, any attempt to shut down
   the SDL thread calls exit(0).  Not exactly what we want to
   return, but at least this makes it not hang waiting for the
   impossible.

Should fix js test suite on darwin.

Translation from mouse coordinates to screen coordinates had issues
with internal vs. external scaling and for when there are gutters
(ie: black bars) on the edges.

This change snaps all gutter clicks to the nearest position inside
the window instead of discarding them, and ensures the calculations
are correct regardless of scaling mode.

Win32GDI mode was not tested, the only change there was to stop
ignoring mouse positions in the gutters.

These are regarding initializing variables at the same time as the
mutex.

Harmless.

This will hopefully keep both Coverity and compilers happy.

This should fix the recent issue when a larger or smaller version
is painted inside the window after resize, as well as fix ALT-→
when the current size is not an integer multiple.

This is my happy place on the desktop system running xfce4... any
higher, and it interferes with how I manage my windows.

Hopefully, this value convers the initialization portion perfectly
on all systems (hah!).

Instead of strictly using "first resize", also count flushes and
assume the hack isn't needed after five.  Experimentation on my
ChromeBook shows 3 to be sufficient, so I'm sing five for now.

Odds are that this will still mess with tiling WMs, but I don't use
one, so I don't mind yet.  I expect this will be better, but likely
still not great.

Fixes issue with possible corrupt display when "weird" scaling
changes occured.

The first time we receive a MapNotify or ConfigureNotify that sets
the width and height, resize the window instead of accepting the
current window size.

Also, fix macro name collision with GetDiskFreeSpaceEx

This way, WMs that enforce aspect ratio etc, won't get potentially
block the update.

This is likely what make the old broken values appear to work.

Fixes crash when built without X11 or SDL, but with GDI (not default)

CSI=255h was not entering doorway mode anymore.

Basically everywhere was off by one.

Also, fix the get dpi size thingie to correct for window decorations.
We never actually use the result of this, but Windows might for
outline dragging or something... you can never know.

So do more terrible hackery.

This means ciolib utilities built with MSVC won't have the right
manifest information, but the documentation is terrible and I can't
figure it out.

Looks like this was where it messed up first.