coverity#1158081 Unchecked dynamic_cast
coverity#1158081 Unchecked dynamic_cast

Change-Id: Ia67656ac35d50c1f70045ff8e9084bcc54b0d9a8

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