Description:
------------
The getLineNo() method exists for DOMText but doesn't work correctly; it always returns 0.

Test script:
---------------
<?php
$xml = <<<EOF
<foo>
    <bar>baz</bar>
</foo>
EOF;
$doc = new DOMDocument();
$doc->loadXML( $xml );
$text = $doc->documentElement->firstChild->nextSibling->firstChild;
echo get_class( $text ) . ' : ' . $text->data . ' : ' . $text->getLineNo() . "\n";
?>

Expected result:
----------------
DOMText : baz : 2


Actual result:
--------------
DOMText : baz : 0