Fixed bug in situation where no shared strings and running in memory
Fixed bug in situation where no shared strings and running in memory

jmptrader/excel_to_code,jmptrader/excel_to_code,kevinmel2000/excel_to_code,tamc/excel_to_code,dberlin/excel_to_code,tamc/excel_to_code,tamc/excel_to_code,kevinmel2000/excel_to_code,dberlin/excel_to_code,tamc/excel_to_code