show articles without creators set, because metaweblog api, etc. don'…

…t do this correctly yet.

vendor/plugins/ansuz_blog/app/views/articles/_article.html.erb

@@ -1,6 +1,6 @@
 <div class='blog_post' id='<%= dom_id(article) -%>'>
   <h2><%= link_to(h(article.title), article_path(article)) -%></h2>
-  <h3 class='supplemental'>Posted on <%= article.created_at.strftime("%B %e, %Y") %> by <%= article.creator.login %>.</h3>
+  <h3 class='supplemental'>Posted on <%= article.created_at.strftime("%B %e, %Y") %><% if article.creator %> by <%= article.creator.login %><% end %>.</h3>
   <div class='contents'>
     <%= article.contents -%>
   </div>