message: Only export NULLs if something actually went wrong!
diff: @@ -3128,7 +3128,10 @@ void BufferViewer::exportData(const BufferExport &params)
  bytes += d.stride * idx;
  if(bytes + d.byteSize <= (const char *)d.end)
  + {
  f->write(bytes, d.byteSize);
  + continue;
  + }
  }
  // if we didn't continue above, something was wrong, so write nulls
  