fix coverity#704768
fix coverity#704768

Change-Id: Ifa33288c01d9b1f8f578db5b4a0f5f03ab5ceaad

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