write only non NaN chart series values (fixes part of n#760997
write only non NaN chart series values (fixes part of n#760997

Change-Id: I7c5bc8b9375a325d4ea78f033f577eff44cfd6e9

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