Use flexible array members.

They are supported by GCC, Clang and MSVC and using them is better than
using arrays of size 1, which actually constitutes undefined behaviour!

Change-Id: I8041d71ffcf7ee6481c000a81a26c0083b726b90
Reviewed-on: https://code-review.googlesource.com/4981
Reviewed-by: Paul Wankadia <junyer@google.com>
2 files changed