coverity#1302609 Division or modulo by zero
coverity#1302609 Division or modulo by zero

Change-Id: Ia578a948b776c15372d3940b350f20048bb6124c

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core