fix total number of results - GG changes id name

[nhutle]

If I'm not mistaken, Google has changed id name of total result from #resultStats -> #result-stats, so this patch will fix it.

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This change is 

[arcaniafr]

Correct code :

$item = $this->cssQuery('#resultStats');

if ($item->length != 1) {
$item = $this->cssQuery('#result-stats');
}
else {
return null;
}