FYI: fix Solaris problem with auto host charset

[Tom Tromey]

>>>>> "Tom" == Tom Tromey <tromey@redhat.com> writes:

Eli> Btw, why is the code assuming that nl_langinfo always returns a
Eli> meaningful result?

Tom> Oversight.

I re-read the relevant standard text online, and as far as I can tell,
nl_langinfo will only return an empty string if the argument is invalid.
So, I don't think this is an issue for gdb.

Tom