Report read error if both "genid" and "docid" IDs are found in the same document, to prevent silent merging of distinct blank nodes.
Report read error if both "genid" and "docid" IDs are found in the same document, to prevent silent merging of distinct blank nodes.


git-svn-id: 3ef324c313953cf23400aadf260ac472ecaf2802@320 490d8e77-9747-427b-9fa3-0b8f29cee8a0

drobilla/serd,drobilla/serd