Fix preventing default behavior of events in windows phone

[ezhlobo]

Correct preventing of link executing in WP8.

Test case:

<a id="link" href="http://www.google.com">link to google</a>

<div id="console" style="font-family: Consolas, Courier New, monospace"></div>

<script type="text/javascript">
document.getElementById( 'link' ).addEventListener( 'tap', function ( e ) {
    e.preventDefault();
    document.getElementById( 'console' ).innerHTML += '<p>Tap event</p>';
});
</script>