Count rows without throwing an exception if there are none

gistfile1.txt

		// If there are no matches, getSingleScalarResult will throw an exception
		try
		{
			$this->numResults = $countQb->getQuery()->getSingleScalarResult();
		} catch (\Doctrine\ORM\NoResultException $e)
		{
			// This happens when zero rows are returned
			$this->numResults = 0;
		}