LOK DocView: handle document load failure without crashing.
LOK DocView: handle document load failure without crashing.

Change-Id: Icd668b3a7ec3ac58322a6af3f1da6008837d0b6b

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