[PUSHED] fdo#43460 chart2: use isEmpty()

[Noel Power (via Code Review)]

Hi,

Thank you for your patch!  It has been merged to LibreOffice.

If you are interested in details, please visit

    https://gerrit.libreoffice.org/4315

Approvals:
  Noel Power: Verified; Looks good to me, approved


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Gerrit-MessageType: merged
Gerrit-Change-Id: Ia74923ed8f00adfa3f7758edb4e5755fedb0ec8a
Gerrit-PatchSet: 2
Gerrit-Project: core
Gerrit-Branch: master
Gerrit-Owner: Jelle van der Waa <jelle at vdwaa.nl>
Gerrit-Reviewer: Noel Power <noel.power at suse.com>