coverity: fix memory leak
coverity: fix memory leak

Change-Id: I9fa99a3f2a5de644961cbf8b9951e1c1246d97cb

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