e class="memname">
        <tr>
          <td class="memname">#define ZERO&#160;&#160;&#160;0                                 /* Something in zero state. */</td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="aae241d4e645b81fce29ef421dca104cf" name="aae241d4e645b81fce29ef421dca104cf"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aae241d4e645b81fce29ef421dca104cf">&#9670;&#160;</a></span>check_data_validity()</h2