xmlElement before a textNode is ignored

When creating an xmlElement right before a textNode on the same level it is ignored.

``` javascript
xml(
    {
        test:[
            {'foo1':''},
            {'bar1':''},
            'textNode',
            {'foo2':''},
            {'bar2':''}
        ]
    }
)
```

Yields the result

``` xml
<test><foo1></foo1>textNode<foo2></foo2><bar2></bar2></test>
```

Notice the lack of bar1
