64-bit buglet

[Ben Elliston]

>>>>> "Richard" == Richard Henderson <rth@redhat.com> writes:

  Richard> I need the following to build sid on an Alpha.  This issue
  Richard> is that the two arguments to std::min must be the same type,
  Richard> otherwise the template does not match.

It would probably be better to use static_cast<size_t> (len) instead
for consistency with the rest of the source tree.  Otherwise, commit
away.

Ben