coverity#1169839 Unintentional integer overflow
coverity#1169839 Unintentional integer overflow

Change-Id: I21d7962043e26e8a7973dd2f9305dd6a48f3db4a

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