coverity#705482 Dereference null return value
coverity#705482 Dereference null return value

Change-Id: Id50d79c2dddc3105821703fb9773128c0cc6f2f3

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