[Bug c++/57480] struct with a va_list considered as non-POD

[roman at tsisyk dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57480

--- Comment #4 from Roman Tsisyk <roman at tsisyk dot com> ---
I use offsetof on this structure and C++ produces a warning about POD data
type.
std::is_pod is not so important here.
I temporary add -Wno-invalid-offsetof to my code.