修复点击某些贴吧提示数据不存在的404page not found bug

app/views/tags/_tag_name.html.erb

@@ -71,8 +71,8 @@
 
 	         <% end %>
             <% when '5' %>
-          <% if Forum.find(params[:id]) %>
-	          <% if Forum.find(params[:id]).creator_id == User.current.id %>
+          <% if Forum.find(obj.id) %>
+	          <% if Forum.find(obj.id).creator_id == User.current.id %>
 	         <span class='del'> <%= link_to 'x', :controller => "tags", :action => "remove_tag", :remote => true, :tag_name => tag,
                                             :taggable_id => obj.id, :taggable_type => object_flag %> </span>