coverity#1078538 Division or modulo by zero
coverity#1078538 Division or modulo by zero

Change-Id: I4f8f66689b46f594664c44da4e892983f38ad32e

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