message: elle.Buffer: avoid division by 0
diff: @@ -612,6 +612,7 @@ namespace elle
  auto const max_length = 20;
  auto const hex =
  stream.flags() & std::ios::hex
  + || buffer.empty()
  || float(boost::count_if(buffer, ::isprint)) / buffer.size() < 0.9;
  if (is_fixed(stream) && signed(buffer.size()) > max_length)
  {
  