coverity: fix memory leak
coverity: fix memory leak

Change-Id: I5d9d240af15f3c7da1e6fe29a69dc0366684b55f

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