lib/sync-file.js
function write(obj) {
  if(obj.type === 'crc') return this.end();
  var buffer = this.converter.entry(obj);
  this.crc.push(buffer);
  return this.writeBuffer(buffer);
}
function write(obj) {
  if(obj.type === 'crc') return this.end();
  var buffer = this.converter.entry(obj);
  this.crc.push(buffer);
  return this.writeBuffer(buffer);
}
Write an object to the file synchronously.