[Libreoffice] [REVIEW] Fix for fdo#37646

[Kohei Yoshida]

I'd like to cherry-pick 

http://cgit.freedesktop.org/libreoffice/libs-core/commit/?id=6d2ddc29ef3fc8535edfda879404a2f8016e054e

from master to -3-4 branch in order to fix

https://bugs.freedesktop.org/show_bug.cgi?id=37646

Again, this is a simple fix also. 

Review & sign-off appreciated.

Kohei

-- 
Kohei Yoshida, LibreOffice hacker, Calc
<kyoshida at novell.com>