learningequality/ka-lite — pull request #1544 by rtibbles (2014-02-17 20:39:11+00:00)
Title: Skip over log data with no completion timestamp when rendering timeline stats on central server

Fix for #1480

Summary of changes:
* If there is no completion_timestamp don't try to include the data in the graph.

@bcipolli This is the next iteration in my long running series of tiny pull requests. It works.