bugfix: lib/sql_io.py: null_strs_str_default: removed "NA" because this is the abbr for a Spanish province (Navarra). this fixes the 2nd bug of #955, geovalidation duplicated rows.
bugfix: lib/sql_io.py: null_strs_str_default: removed "NA" because this is the abbr for a Spanish province (Navarra). this fixes the 2nd bug of #955, geovalidation duplicated rows.