Hack: Work around an NPE in hyphenation when preserved line feeds are found.
Documenting a bug where linefeeds are painted as "#" and content is painted multiple times when hyphenation is on and linefeed-treatment="preserve".
git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@356804 13f79535-47bb-0310-9956-ffa450edef68