coverity#706115 Unintended sign extension
coverity#706115 Unintended sign extension

and

coverity#706114 Unintended sign extension
coverity#706113 Unintended sign extension

Change-Id: Ib9ab82082fb353ecfc98a4130fdf2bb136ac1350

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