fix RTF_LS: NS_rtf::LN_LSID is an attribute
fix RTF_LS: NS_rtf::LN_LSID is an attribute

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