coverity#705726: fix memory leak
coverity#705726: fix memory leak

Change-Id: I8ccbd73a937e7506a64ae1925ca20d420117fb73

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