clean up options.end code - wasn't working

lib/stream.js

@@ -23,9 +23,7 @@ Stream.prototype.pipe = function (dest, options) {
    * source gets the 'end' event.
    */
 
-  options.end = options && options.end === false ? false : true;
-
-  if (options.end) {
+  if (!options || options.end === false) {
     source.on("end", function () {
       dest.end();
     });