Be consistent with the rest of the XML Schema API by returning an empty list instead of null.
Be consistent with the rest of the XML Schema API by returning an empty list instead of null.

git-svn-id: 21df804813e9d3638e43477f308dd0be51e5f30f@778435 13f79535-47bb-0310-9956-ffa450edef68

jimma/xerces,ronsigal/xerces,ronsigal/xerces,jimma/xerces,ronsigal/xerces,jimma/xerces