fixing empty string regression
fixing empty string regression

h/t @nathanathan

kaktus40/js-xlsx,kaktus40/js-xlsx,iCasa/js-xlsx,kaktus40/js-xlsx,iCasa/js-xlsx,SheetJS/js-xlsx,thien-thach/searchFromExcel,SheetJS/js-xlsx,SheetJS/js-xlsx,kaktus40/js-xlsx,iCasa/js-xlsx,iCasa/js-xlsx,SheetJS/js-xlsx,thien-thach/searchFromExcel