Adjust check to not rely on lexicographical order. This amends
8ae3ddca.

Change-Id: I0e9ea916f2efaf21a8f44df4483a55ce7f6be33f
Reviewed-on: https://gerrit.libreoffice.org/2196Reviewed-by: Andras Timar <atimar@suse.com>
Tested-by: Andras Timar <atimar@suse.com>