Better PixelArray#inspect()

lib/pixelarray.js

@@ -18,11 +18,11 @@ var Canvas = require('../build/default/canvas')
 
 PixelArray.prototype.inspect = function(){
   var buf = '[PixelArray ';
-  for (var i = 0, len = this.length; i < len; ++i) {
+  for (var i = 0, len = this.length; i < len; i += 4) {
     buf += '\n  ' + i + ': rgba('
-      + this[i++] + ','
-      + this[i++] + ','
-      + this[i++] + ','
+      + this[i + 1] + ','
+      + this[i + 2] + ','
+      + this[i + 3] + ','
       + this[i] + ')';
   }
   return buf + '\n]';