coverity#705699: fix memory leak
coverity#705699: fix memory leak

Change-Id: Ib0561a18082759d3ccd4175164d3398fa028ba8c

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