The markup is:

<dgm:if name="Name6" axis="ch ch" ptType="node node" st="1 1" cnt="1 0" func="cnt" op="gte" val="1">

Where PowerPoint evaluated the condition to true, but Impress evaluated
to false. This means that the undocumented relation between the child
lists is "OR" (not "AND").

Also, our code assumed that "node" has to be a data node (not
presentation node), but it seems the only way this condition can be true
if presentation children is also counted. (The presentation node in
question is not a presentation of anything.)

Change-Id: I094b44351aeb8058cd50753f46fcdac7a88b35cd
Reviewed-on: https://gerrit.libreoffice.org/67510Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins