vcl: these compare functions use subtraction and could overflow
vcl: these compare functions use subtraction and could overflow

Change-Id: I84c7a4cde694395fa70c60edffd63fb45ffcb3a8

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