[PUSHED libreoffice-4-1] Related fdo#33895 add some checks against NULL derefs

[Miklos Vajna (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/4223

Approvals:
  Miklos Vajna: Verified; Looks good to me, approved


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Gerrit-MessageType: merged
Gerrit-Change-Id: I9c62a063788a494125ce8dc27748ed66022f5c48
Gerrit-PatchSet: 2
Gerrit-Project: core
Gerrit-Branch: libreoffice-4-1
Gerrit-Owner: Julien Nabet <serval2412 at yahoo.fr>
Gerrit-Reviewer: Julien Nabet <serval2412 at yahoo.fr>
Gerrit-Reviewer: Miklos Vajna <vmiklos at suse.cz>