fix bug with resize closes #448

Author: Lauren McCarthy

lib/p5.js

@@ -1,4 +1,4 @@
-/*! p5.js v0.3.13 December 04, 2014 */
+/*! p5.js v0.3.13 December 05, 2014 */
 var shim = function (require) {
     window.requestDraw = function () {
       return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function (callback, element) {
@@ -1019,7 +1019,7 @@ var p5Image = function (require, core, filters) {
     };
     p5.Image.prototype.resize = function (width, height) {
       width = width || this.canvas.width;
-      height = width || this.canvas.height;
+      height = height || this.canvas.height;
       var tempCanvas = document.createElement('canvas');
       tempCanvas.width = width;
       tempCanvas.height = height;