[Bug c++/90010] valgrind error with snprintf and -Wall

[dcb314 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90010

--- Comment #1 from David Binderman <dcb314 at hotmail dot com> ---
I forgot to mention that I have also set a valgrind option:

$ set | fgrep VAL
VALGRIND_OPTS=--expensive-definedness-checks=yes
$

Might be significant.