* src/gen/db/base.py: allow not to create gramps_id on add * src/GrampsDbUtils/_ReadXML.py: on sourceref, don't create gramps_id * src/GrampsDb/_GrampsInMemDB.py: remove gid from memory map only if not None svn: r9119
* src/gen/db/base.py: allow not to create gramps_id on add * src/GrampsDbUtils/_ReadXML.py: on sourceref, don't create gramps_id * src/GrampsDb/_GrampsInMemDB.py: remove gid from memory map only if not None svn: r9119