tweak crop.js example slightly

examples/crop.js

@@ -7,8 +7,7 @@ var Canvas = require('../lib/canvas')
   , Image = Canvas.Image
   , fs = require('fs');
 
-var img = new Image
-  , start = new Date;
+var img = new Image;
 
 img.onerror = function(err){
   throw err;
@@ -19,21 +18,17 @@ img.onload = function(){
     , h = img.height / 2
     , canvas = new Canvas(w, h)
     , ctx = canvas.getContext('2d');
+
   ctx.drawImage(img, 0, 0, w, h, 0, 0, w, h);
 
-  var out = fs.createWriteStream(__dirname + '/crop.jpg')
-    , stream = canvas.createJPEGStream({
-        bufsize : 2048,
-        quality : 80
-      });
+  var out = fs.createWriteStream(__dirname + '/crop.jpg');
 
-  stream.on('data', function(chunk, len){
-    out.write(chunk);
+  var stream = canvas.createJPEGStream({
+    bufsize : 2048,
+    quality : 80
   });
 
-  stream.on('end', function(){
-    console.log('Cropped and saved in %dms', new Date - start);
-  });
+  stream.pipe(out);
 };
 
 img.src = __dirname + '/images/squid.png';