ether/etherpad-lite — pull request #1984 by ldidry (2013-11-07 21:52:41+00:00)
Title: Fix getRevisionChangeset API call making etherpad crash

Using `getRevisionChangeset` makes etherpad crash.

Here's my log:
[2013-11-07 22:07:05.331] [INFO] API - REQUEST, v1.2.8:getRevisionChangeset, {"apikey":"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx","padID":"test"}
[2013-11-07 22:07:05.371] [INFO] API - RESPONSE, getRevisionChangeset, 500
[2013-11-07 22:07:05.413] [ERROR] console - TypeError: Property 'callback' of object #