Description:
------------
 mysqlnd's implementation of stmt_reset() has a bug, that stored results sets exist but cannot be read if mysqli_stmt::reset() is called. After reset the data is unavailable.

Test script:
---------------
<?php
$link = new mysqli_connect('127.0.0.1', 'root', 'root', 'test');
$s = $mysqli->prepare('SELECT 42');
$s->execute();
$s->store_result();
$one = NULL;
$s->bind_result($one);
$s->reset();
while ($s->fetch()) {
  var_dump($one);
}
$s->close();
$c->close();
?>

Expected result:
----------------
int(42)

Actual result:
--------------
nothing