Fix exception for old powerpoint documents without the usual stream name

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1847487 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Andreas Beeker 2018-11-26 20:54:43 +00:00
parent 1468ede3ae
commit 746e22ea88

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