coverity#1157791 Division or modulo by zero
coverity#1157791 Division or modulo by zero

Change-Id: I6b46a037b0d5f13681ad4936ddd56fd80c8128fb

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