Fix in case author has no image

partials/loop.hbs

@@ -13,7 +13,7 @@
         <p>{{excerpt words="30"}} <a class="read-more" href="{{url}}">&raquo;</a></p>
     </section>
     <footer class="post-meta">
-        <img class="author-thumb" src="{{author.image}}" alt="Author image" nopin="nopin" />
+        {{#if author.image}}<img class="author-thumb" src="{{author.image}}" alt="Author image" nopin="nopin" />{{/if}}
         <a href="{{@blog.url}}/author/{{author.slug}}">{{author.name}}</a>
         {{tags prefix=" on "}} 
         <time class="post-date" datetime="{{date format='YYYY-MM-DD'}}">{{date format="DD MMMM YYYY"}}</time>