fix classification bug
fix classification bug

potree/PotreeConverter,eokeeffe/PotreeConverter,potree/PotreeConverter,Georepublic/PotreeConverter,sverhoeven/PotreeConverter,sverhoeven/PotreeConverter,Georepublic/PotreeConverter,Georepublic/PotreeConverter,potree/PotreeConverter,kyroskoh/PotreeConverter,kyroskoh/PotreeConverter,potree/PotreeConverter,potree/PotreeConverter,kyroskoh/PotreeConverter,sverhoeven/PotreeConverter,kyroskoh/PotreeConverter,eokeeffe/PotreeConverter,eokeeffe/PotreeConverter,potree/PotreeConverter,Georepublic/PotreeConverter,potree/PotreeConverter,sverhoeven/PotreeConverter