coverity#1267672 Unchecked dynamic_cast
coverity#1267672 Unchecked dynamic_cast

Change-Id: Ic5cda0155d54aed7fa89df0fddd6407417b2e133

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