Sample file for #56260, provided by Atlassian in CONF-18721

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1577536 13f79535-47bb-0310-9956-ffa450edef68
#56260 Partial fix for a slide with a TextHeaderAtom but no other atoms related to it, which is followed by another TextHeaderAtom straight away

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1577537 13f79535-47bb-0310-9956-ffa450edef68