fix for fdo#54046
fix for fdo#54046

fix case where the value is neither uno object or unostruct

Change-Id: I2862ab23a875a691edb202bb9d334b000871f718

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