coverity#1241199 Unchecked dynamic_cast
coverity#1241199 Unchecked dynamic_cast

Change-Id: Ib1ba5d63b258202a6a8c2113906ad22ff79a352c

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