coverity#1158100 Unchecked dynamic_cast
coverity#1158100 Unchecked dynamic_cast

Change-Id: I3040703b7182d186ac9e27c33295e929b8dc9ffe

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