[PATCH] libstdc++: Fix static_assert.

[Torvald Riegel]

On Sun, 2016-01-17 at 17:03 +0000, Jonathan Wakely wrote:
> On 17 January 2016 at 17:01, Jonathan Wakely wrote:
> > On 16 January 2016 at 22:47, Torvald Riegel wrote:
> >> This adds a missing string argument to a call to static_assert, thus not
> >> making it depend on c++1z extensions.  This fixes the build breakage on
> >> mingw introduced in 232454.
> >>
> >> Tested on x86_64-linux.  OK?
> >
> > OK.
> 
> Actually please change the message, so it states the condition being
> tested, not the negation.
> 
> e.g. "Pointers are 32 bits or 64 bits wide"
> 
> or state what must be true, "Pointers must be 32 bits or 64 bits wide"

I committed the latter.