coverity#706049 Unintended sign extension
coverity#706049 Unintended sign extension

Change-Id: Idb9c4aa6475fcd9edd0d76c06509df182bd2111c

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