[question] Node removeChild() set to null

When Node1.removeChild(node2) is called, the index of node2 in Node1._children array is set to NULL.
This causes an error when, after a removeChild, i use events:

Uncaught TypeError: Cannot read property 'onReceive' of null

here:

Dispatch.prototype.dispatch = function dispatch (event, payload) {
if (!event) throw new Error('dispatch requires an event name as it\'s first argument');

```
var queue = this._queue;
var item;
var i;
var len;
var children;

queue.length = 0;
queue.push(this._context);

while (queue.length) {
item = queue.shift();
if (item.onReceive) item.onReceive(event, payload);
children = item.getChildren();
for (i = 0, len = children.length ; i < len ; i++) queue.push(children[i]);
}
```

};

I managed to fix this, by changing:

this._children[index] = null;

with:

this._children.splice(index, 1);

in the removeChild() function of core/Node.

Is this intentional?
Does this change affect other things?