[PATCH] Fix newlocale, uselocale, duplocale, is*_l and to*_l

[Roland McGrath]

D'oh!  I had of course made the newlocale changes but failed to check
that file in, I don't know how I failed to notice it there in my tree.
The uselocale behavior was an oversight and of course duplocale was a typo.
I don't like uglifying the natural order of the struct declaration for
binary compatibility with a release that has never been.