`HGLOBAL` (a `HANDLE`) gets bound as `isize`

[squeek502]

Noticed this in the STGMEDIUM binding:

zigwin32/win32/system/com.zig

Lines 3735 to 3747 in 18c9630

	pub const STGMEDIUM = extern struct {
	tymed: u32,
	Anonymous: extern union {
	hBitmap: ?HBITMAP,
	hMetaFilePict: ?*anyopaque,
	hEnhMetaFile: ?HENHMETAFILE,
	hGlobal: isize,
	lpszFileName: ?PWSTR,
	pstm: ?*IStream,
	pstg: ?*IStorage,
	},
	pUnkForRelease: ?*IUnknown,
	};

It seems like the json generated treats the HGLOBAL as IntPtr:

https://github.com/marlersoft/win32json/blob/a0cef2ae9d4c2a46cb9cf16aafaad5e470fa1cee/api/System.Com.json#L4903

My minwindef.h defines it as:

typedef HANDLE              HGLOBAL;