message: Increment the offset if it was set.
diff: @@ -332,7 +332,7 @@ namespace NodeLibcurl {
  // get the offset
  curl_off_t offset = obj->readDataOffset;
  - if ( offset > 0 ){
  + if ( offset >= 0 ){
  // increment it for the next read
  obj->readDataOffset += n;
  }
  