<p>fixes <a href="https://github.com/opentechinstitute/luci-commotion/issues/441" class="issue-link" title="Adding app categories in luci produces error">#441</a>.</p>

<p>to test, go to app settings page and click submit. Should not produce a LuCI error.</p>

<hr>

<h4>You can merge this Pull Request by running</h4>
<pre>  git pull https://github.com/opentechinstitute/luci-commotion issue-441</pre>
<p>Or view, comment on, or merge it at:</p>
<p>  <a href='https://github.com/opentechinstitute/luci-commotion/pull/442'>https://github.com/opentechinstitute/luci-commotion/pull/442</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>fix validation function for app settings expiration time field</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/opentechinstitute/luci-commotion/pull/442/files#diff-0">luasrc/model/cbi/commotion/app_settings.lua</a>
    (6)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/opentechinstitute/luci-commotion/pull/442.patch'>https://github.com/opentechinstitute/luci-commotion/pull/442.patch</a></li>
  <li><a href='https://github.com/opentechinstitute/luci-commotion/pull/442.diff'>https://github.com/opentechinstitute/luci-commotion/pull/442.diff</a></li>
</ul>

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