windowscodecs: Workaround libtiff bug when it defines toff_t as 32-bit for 32-bit builds. Take 2.

[Dmitry Timoshkov]

Alexandre Julliard <julliard at winehq.org> wrote:

> >> TIFF_VERSION_CLASSIC reflects the TIFF format itself, it's defined
> >> to 42, TIFF_VERSION_BIG introduced in 4.x defined to 43.
> >> 
> >> Unfortunately TIFFLIB_VERSION define reflects the date, not the real
> >> version. So for instance libtiff 3.9.7 has it defined to 20120922,
> >> 4.0.0 - 20111221, 4.0.1 - 20120218. I don't see a way to differentiate
> >> between 3.x and 4.x at compile time.
> >
> > I see that this patch is now marked as 'pending'. Are my arguments not
> > clear enough?
> 
> You shouldn't check the version, but the actual problem (i.e. the size
> of the offending type). Also please avoid unnecessary changes.

What changes do you consider as unnecessary?

-- 
Dmitry.