[bugfix] Fix following-sibling selection at document-node()/node() of in-memory nodes
[bugfix] Fix following-sibling selection at document-node()/node() of in-memory nodes

olvidalo/exist,windauer/exist,eXist-db/exist,wolfgangmm/exist,windauer/exist,olvidalo/exist,ambs/exist,lcahlander/exist,dizzzz/exist,olvidalo/exist,lcahlander/exist,eXist-db/exist,lcahlander/exist,opax/exist,opax/exist,adamretter/exist,hungerburg/exist,eXist-db/exist,dizzzz/exist,hungerburg/exist,windauer/exist,wolfgangmm/exist,adamretter/exist,adamretter/exist,olvidalo/exist,wolfgangmm/exist,lcahlander/exist,ambs/exist,wolfgangmm/exist,ambs/exist,opax/exist,dizzzz/exist,hungerburg/exist,adamretter/exist,lcahlander/exist,windauer/exist,adamretter/exist,olvidalo/exist,hungerburg/exist,ambs/exist,eXist-db/exist,lcahlander/exist,ambs/exist,opax/exist,windauer/exist,dizzzz/exist,dizzzz/exist,dizzzz/exist,wolfgangmm/exist,wolfgangmm/exist,hungerburg/exist,windauer/exist,eXist-db/exist,eXist-db/exist,adamretter/exist,opax/exist,ambs/exist