发现一点小问题，不知道算不算bug

建立时类型选的是频道，然后后台修改频道改为顶级板块，发布文章后调用失效，重新建立一个顶级栏目，文章移动到新建立顶级栏目，可以调出内容，

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      <h4 class="title_1"><em class="iconfont icon-zuixinshijian"></em><span>最新文章</span></h4>
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