[Bug c++/110848] Consider enabling -Wvla by default in C++ modes

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110848

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC has documented VLA extensions for C++ support since
r0-35216-g4b404517536c85 (PR 930 which was done in 2001). So ....