[Libreoffice] [REVIEW] Correctly identify documents with .xlk extension

[Kohei Yoshida]

Hi there,

I'd like to have the following commit cherry-picked to the -3-4 branch

http://cgit.freedesktop.org/libreoffice/filters/commit/?id=9ae1a63b1c74e19bc2f21d31e6979c507ce43f7c

This is a minor change.  It allows files with .xlk extension to be
correctly opened in Calc.  .xlk extension is associated with Excel
backup file.  It's the file Excel creates automatically when opening a
document as a backup.  The content of this file is still a normal Excel
file, so there is no reason not to open such files correctly.

Review & sign-off etc appreciated.

Kohei

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