CURRENT: CLANG 3.3 and -stad=c++11 and -stdlib=libc++: isnan()/isninf() oddity

[Raphael Kubo da Costa]

Raphael Kubo da Costa <rakuco at FreeBSD.org> writes:

> This seems to have been committed in r253321, and broke some code that
> was working with r253320; namely, some code in x11/kde4-workspace
> includes math.h and calls isnan() with a const double.

For posterity, David has reverted the code back to the previous
behaviour in r253766.