add dumb fix for empty list -- raises error in test_parse_config
add dumb fix for empty list -- raises error in test_parse_config

funginstitute/patentprocessor,nikken1/patentprocessor,yngcan/patentprocessor,nikken1/patentprocessor,nikken1/patentprocessor,funginstitute/patentprocessor,yngcan/patentprocessor,yngcan/patentprocessor,funginstitute/patentprocessor