Group.destroy checks parent before removing (thanks @clark-stevenson, fix phaserjs#733)

Author: photonstorm

README.md

@@ -88,6 +88,7 @@ Version 2.0.4 - "Mos Shirare" - in development
 * Animation.destroy didn't correctly clear the onStart, onLoop and onComplete signals.
 * StateManager.restart incorrectly skipped the first additional parameter after clearCache (thanks @mariusbrn, fix #722)
 * Line.angle and Math.angleBetween used Math.atan2 arguments in the wrong order (thanks @jotson, fix #724)
+* Group.destroy checks parent before removing (thanks @clark-stevenson, fix #733)
 
 
 ### ToDo

src/core/Group.js

@@ -1559,10 +1559,12 @@ Phaser.Group.prototype.destroy = function (destroyChildren, soft) {
 
     if (!soft)
     {
-        this.parent.removeChild(this);
+        if (this.parent)
+        {
+            this.parent.removeChild(this);
+        }
 
         this.game = null;
-
         this.exists = false;
     }