coverity#1202783 Division or modulo by zero
coverity#1202783 Division or modulo by zero

Change-Id: I17892b9daa3be450001ac88239008d0d27f4a01f

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