coverity#1019327 Unchecked dynamic_cast
coverity#1019327 Unchecked dynamic_cast

Change-Id: Ibc5a1478d196681cbc124886924eebf065bbdb11

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