[Bug bootstrap/78817] stage2 bootstrap failure in vec.h:1613:5: error: argument 1 null where non-null expected after r243661

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78817

--- Comment #16 from Martin Sebor <msebor at gcc dot gnu.org> ---
r243736 should avoid the warning in ordinary bootstrap.  A patch for most of
the profiledbootstrap warnings has been posted for review here:

https://gcc.gnu.org/ml/gcc-patches/2016-12/msg01437.html