coverity#1158094 Unchecked dynamic_cast
coverity#1158094 Unchecked dynamic_cast

Change-Id: Ieac19e8dbb8328791d0c7110e9c787ec7c3bd448

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