fix related_posts

layout/_partial/main/article/related_posts.ejs

@@ -1,5 +1,16 @@
-<div class='related-wrap' id='related-posts'><%-
-popular_posts_wrapper({
+<%
+function layoutDiv() {
+  if (theme.article.related_posts.enable) {
+    var el = '';
+    el += '<div class="related-wrap" id="related-posts">';
+    el += popular_posts_wrapper({
       title: __('meta.related_posts'),
       json: popular_posts_json({ maxCount: 5 , ulClass: 'related-posts' , PPMixingRate: 0.2 , isImage: true , isExcerpt: true} , page )
-}) %></div>
+    });
+    el += '</div>';
+    return el;
+  }
+  return;
+}
+%>
+<%- layoutDiv() %>