Protect against NPEs and other failures which could occur if the application sets the LSParserFilter to null in the middle of a parse.
Protect against NPEs and other failures which could occur
if the application sets the LSParserFilter to null in the
middle of a parse.

git-svn-id: 21df804813e9d3638e43477f308dd0be51e5f30f@710002 13f79535-47bb-0310-9956-ffa450edef68

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