移出成员时，删除项目后没有关联删除而引起的400问题

app/views/users/_user_message_forge.html.erb

@@ -57,6 +57,7 @@
     <% end %>
     <!--被管理员移出项目-->
     <% if ma.forge_message_type == "RemoveFromProject" %>
+      <% unless ma.project.nil? %>
         <ul class="homepageNewsList fl">
           <li class="homepageNewsPortrait fl">
             <a href="javascript:void(0);"><%=link_to image_tag(url_to_avatar(User.find(ma.forge_message_id)), :width => "30", :height => "30"), user_path(ma.forge_message_id) %></a>
@@ -87,6 +88,7 @@
           </div>
           <li class="homepageNewsTime fl"><%= time_tag(ma.created_at).html_safe %> </li>
         </ul>
+      <% end %>
     <% end %>
     <!--邀请加入项目-->
     <% if ma.forge_message_type == "ProjectInvite" %>