Since FPC 3.2.0, one has to use `ObjCBool` instead of `Boolean`, otherwise GLPT compilation fails at various overrides because the methods are declared in ancestor with `ObjCBool` (not compatible with Pascal `Boolean`).

E.g. in latest FPC, `packages/cocoaint/src/appkit/NSWindow.inc` defines

```
function initWithContentRect_styleMask_backing_defer (contentRect: NSRect; aStyle: NSUInteger; bufferingType: NSBackingStoreType; flag: ObjCBOOL): instancetype; message 'initWithContentRect:styleMask:backing:defer:';
```

In GLPT, this should be overridden with `flag: ObjCBool`, not `flag: Boolean`.

See https://fpcwiki.coderetro.net/User_Changes_3.2.0#objcbase .

Current count (5) is too small to fit various possible values we want
to put on that list.