WaE: NULL used in arithmetic
WaE: NULL used in arithmetic

Change-Id: I89352cd2ae1d5517dff38294ff2bb53d39aadb8d

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