coverity#1158062 Unchecked dynamic_cast
coverity#1158062 Unchecked dynamic_cast

Change-Id: Ife7eae1cbf17c4fae4b147be2b93c1b02bdcab1e

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