simplify specialized SwIterator::First()
simplify specialized SwIterator::First()

Change-Id: I6aac0645939cea0ef8fbfc2796f94cffc56d224e

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