kogmbh/WebODF — pull request #533 by adityab (2014-04-10 14:02:51+00:00)
Title: Fix crash when no style:list-level-properties is present

Just a little drive-by fix I did on noticing this frequent crash whilst testing ODPs for my `z-index` PR.

Previously, WebODF would simply not load documents which did not come with this optional element in a list style.