coverity#706073 Unintended sign extension
coverity#706073 Unintended sign extension

Change-Id: I13272490bf8a08cbfb1ffc37828fb30fb92f9139

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