coverity#983449 Unintended sign extension
coverity#983449 Unintended sign extension

also

coverity#983450

Change-Id: I43f88005ab130f74df2316f51ab898b112002044

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