coverity#705404: Argument cannot be negative
coverity#705404: Argument cannot be negative

Change-Id: I235a5323ee0fd60aee03c691c0c7fdf6e6e4c08b

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