coverity#705109: use of invalid iterator
coverity#705109: use of invalid iterator

Change-Id: I9c16071a4182801ef5fed8b3d3661accce596716

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