Bug#315198: libc6-dev: FTBFS with gcc-4.0: Fix xdr.h lvalue casts

[Max Vozeler <xam@debian.org>]

Hi glibc maintainers,

> GCC-4.0 is now the default compiler, this bug should be fixed ASAP as it's 
> blocking uploads to packages build-depending on this functionality.

Do you already have plans or a timeframe for uploading 2.3.5 to
unstable?

The bug currently causes util-linux and loop-aes-utils to FTBFS in
unstable, and I can confirm that building with libc6-dev from
experimental works fine.

I can't think of a clean way to work around this bug in packages that
include xdr.h until the macro is changed, should you see one, I would 
very much appreciate to learn.

cheers,
Max