coverity#1130194 Unchecked dynamic_cast
coverity#1130194 Unchecked dynamic_cast

Change-Id: I313d278dedcd7d51466a09ad6a85bfb5c78023d4

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