locale.h

[Dave Peticolas]

Currently, we use configure to find locale.h and only inlude it if
found. I find this a bit odd, since locale.h is a POSIX header and
we include other POSIX headers directly. Also, a few files do actually
include locale.h directly.

Unless someone knows a reason not to, I'm going to just include
locale.h directly and skip the configuration check.

thanks,
dave