coverity#705729: fix memory leak
coverity#705729: fix memory leak

Change-Id: I978d0a34b3f94e66f9ebc5ff0ed8d3068ed4fc12

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