coverity#1158106 Unchecked dynamic_cast
coverity#1158106 Unchecked dynamic_cast

Change-Id: I52af351a470bec9acb7a1981faf0ae6943ceba43

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