iterator::operator*() should return a reference
iterator::operator*() should return a reference

Change-Id: Id09f555c5ece9e5cb60a2ae7bc2456d4343744f5

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