Twenty Thirteen: Add missing loop in the image attachment template.

Props vtieu.
Fixes #35110.

git-svn-id: https://develop.svn.wordpress.org/trunk@36136 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-content/themes/twentythirteen/image.php

@@ -13,6 +13,12 @@ get_header(); ?>
 
 	<div id="primary" class="content-area">
 		<div id="content" class="site-content" role="main">
+
+			<?php
+				// Start the Loop.
+				while ( have_posts() ) : the_post();
+			?>
+
 			<article id="post-<?php the_ID(); ?>" <?php post_class( 'image-attachment' ); ?>>
 				<header class="entry-header">
 					<h1 class="entry-title"><?php the_title(); ?></h1>
@@ -76,6 +82,8 @@ get_header(); ?>
 
 			<?php comments_template(); ?>
 
+			<?php endwhile; // End the loop. ?>
+
 		</div><!-- #content -->
 	</div><!-- #primary -->