# C++ prohibits defeferencing a NULL non-POD pointer (and thus
# prohibits using offsetof on non-POD types, even though there's no
# good reason to disallow it). Some headers use offsetof on non-POD
# C++ prohibits defeferencing a NULL non-POD pointer (and thus
# prohibits using offsetof on non-POD types, even though there's no
# good reason to disallow it). Some headers use offsetof on non-POD