fix 1 or 2 byte color detection
fix 1 or 2 byte color detection

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