sidorares/node-x11 — pull request #72 by anko (2014-11-03 15:16:48+00:00)
Title: Fix null-reference errors from extension-tests

I was getting errors when running the tests with `npm test` which seemed to indicate a null reference issue. Did some digging:

The callback functions in the extension tests were assuming they get either an `Error` or the extension object as a first parameter, but were being called with a possible error on first parameter, then extension as second.

Made some variables local while I was in there.