iidx: workaround for touch monitors that report contact area (#462)

## Link to GitHub Issue, if one exists
n/a

## Description of change
When touch monitors send touch area size information
(`TOUCHEVENTFMASK_CONTACTAREA` flag and `cxContact` / `cyContact` fields
of `TOUCHINPUT` struct) from `GetTouchInputInfo`, IIDX gets confused and
does some unexpected things when interacting with the subscreen.

As a workaround, hook `GetTouchInputInfo` and clear out the flag &
values.

This is only done for IIDX AND when -iidxnativetouch is on.

## Testing
Tested on a Dell touch monitor, simulating "bad" values.

src/spice2x/games/iidx/iidx.cpp

@@ -20,6 +20,7 @@
 #include "hooks/sleephook.h"
 #include "launcher/options.h"
 #include "touch/touch.h"
+#include "misc/nativetouchhook.h"
 #include "misc/wintouchemu.h"
 #include "misc/eamuse.h"
 #include "util/detour.h"
@@ -332,7 +333,9 @@ namespace games::iidx {
                 // need to hook `avs2-core.dll` so AVS win32fs operations go through rom hook
                 devicehook_init(avs::core::DLL_INSTANCE);
 
-                if (!NATIVE_TOUCH) {
+                if (NATIVE_TOUCH) {
+                    nativetouchhook::hook(avs::game::DLL_INSTANCE);
+                } else {
                     wintouchemu::FORCE = true;
                     wintouchemu::INJECT_MOUSE_AS_WM_TOUCH = true;
                     wintouchemu::hook_title_ends("beatmania IIDX", "main", avs::game::DLL_INSTANCE);