java: fix access to always null field
java: fix access to always null field

this cannot have ever worked, but at least it'll stop bugging me now

Change-Id: Idd9738358d18770258ca0648afe4b9256458a4d6

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