Fix a crash with iterator access
Fix a crash with iterator access

Change-Id: I96cae21e79fe0b6f6cd8f3aaae2560cd1f76d65e

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