coverity#736137 Dereference null return value
coverity#736137 Dereference null return value

Change-Id: Ie66e71e2aff49db5c0192fd0e787231081d24060

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