coverity#1187661 Unchecked dynamic_cast
coverity#1187661 Unchecked dynamic_cast

Change-Id: I66f8382c7dd7ab8d115204fe45d6a33ff77adb78

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