The Locale module in 2.2 does not work without threads

Imported from http://bugzilla.roxen.com/bugzilla/show_bug.cgi?id=1642

Reported by @zino

The Locale module in 7.2 does not work without threads. This get_object-snippet in Roxen 2.2:language.pike returns 0:

object language_low(string lang) {
  return [object]Locale.get_object( PROJECT,
                                    verify_locale(lang) )->functions;
}

Backtrace lost.