修复了缩略图无法显示

layout/common/head.ejs

@@ -21,7 +21,7 @@
     <title><% if (title) { %><%= title %> | <% } %><%= config.title %></title>
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1" />
     <%- open_graph({
-        image:          thumbnail(page),
+        image:          page.thumbnail,
         fb_app_id:      theme.miscellaneous.open_graph.fb_app_id,
         fb_admins:      theme.miscellaneous.open_graph.fb_admins,
         twitter_id:     theme.miscellaneous.open_graph.twitter_id,

layout/common/thumbnail.ejs

@@ -1,5 +1,5 @@
 <a href="<%- url_for((post.link ? post.link : post.path)) %>" class="thumbnail">
-    <% var thumbnailUrl = thumbnail(post) %>
+    <% var thumbnailUrl = post.thunbnail %>
     <% if (thumbnailUrl) { %>
         <span style="background-image:url(<%= thumbnailUrl %>)" alt="<%= post.title %>" class="thumbnail-image"></span>
     <% } else { %>