Tidied up how crop destroys itself.

Author: photonstorm

src/gameobjects/Text.js

@@ -224,8 +224,6 @@ Phaser.Text.prototype.destroy = function (destroyChildren) {
 
     this.texture.destroy(true);
 
-    PIXI.CanvasPool.remove(this);
-
     Phaser.Component.Destroy.prototype.destroy.call(this, destroyChildren);
 
 };

src/gameobjects/components/Destroy.js

@@ -102,6 +102,7 @@ Phaser.Component.Destroy.prototype = {
         if (this._crop)
         {
             this._crop = null;
+            this.cropRect = null;
         }
 
         if (this._frame)