from_utf8 field removed. * tool/transcode-tblgen.rb: generate offsets range. follow rb_transcoder change. * transcode.c (transcode_loop): don't use from_utf8. make invalid region from_unit_length wise. * enc/trans/iso2022.erb.c: follow rb_transcoder and transcode_generate_node change. * enc/trans/utf_16_32.erb.c: follow rb_transcoder and transcode_generate_node change. explicit :invalid map removed. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18445 b2dd03c8-39d4-4d8f-98ff-823fe69b080e