coverity#706067 Unintended sign extension
coverity#706067 Unintended sign extension

Change-Id: I7b1ace9726c38eafd063e7bd87f463b23fe9d74a

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