e passed in the case of a simple "is there a 
packet?" check.</dd>
</dl>


<h3>Return Values</h3>
<blockquote>
<ul>
<li>-1 if there's no packet available due to lost sync or a hole
in the data.</li>
<li>1 if a packet is available.</li>
</ul>
</blockquote>


<br><br>

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