coverity#982461 Unchecked dynamic_cast
coverity#982461 Unchecked dynamic_cast

Change-Id: I3933b2cd03b8e1dff7bcb106d841a429e4d0ba53

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