title: Handlebars custom if helper else is undefined
body: <p>I have a custom helper, as follows:</p>
  
  <pre><code>Handlebars.registerHelper('hasAccess', function(val, fnTrue, fnFalse) { 
      return val &gt; 5 ? fnTrue() : fnFalse();
  });
  </code></pre>
  
  <p>and my template, as follows:</p>
  
  <pre><code>{{#hasAccess this.access}}
      You have access!
  {{else}}
      You do not have access
  {{/hasAccess}}
  </code></pre>
  
  <p>It works, except fnFalse is undefined. So, how am I supposed to render the 'else' branch?</p>