[REVIEW 3-6] Simple missing null object check to fix crasher.

[Kohei Yoshida]

Hi there,

I'd like to get this

http://cgit.freedesktop.org/libreoffice/core/commit/?id=fb1d9cc99e026ba9cf15ab49b2251cecfbbf6d10

backported to the 3-6 branch.  Without this check, importing the 
following document

http://www.bedrunecka.cz/epd/3_naklady_a_kalkulace.ppt

will crash soffice.

I think the change is simple enough to be backported safely.

Kohei

-- 
Kohei Yoshida, LibreOffice hacker, Calc