coverity: fix memory leak
coverity: fix memory leak

Change-Id: Iaa27244b1829bfe5a26c9352da6a8819d3037ccd

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