losing trailing L

[visr]

I just tried out the new Clang.jl 0.15.2 here: JuliaGeo/GDAL.jl@6ed9476

And it looks like I'm losing trailing L 😆
This is probably an unwanted side effect of the fix for #357, is that right?

In that diff I also see that GINTBIG_MAX and GUINTBIG_MAX are gone. They are used in the right hand side later on, so this creates an error. Shall I make a separate issue for that, or am I doing something wrong?