gitlabhq/gitlabhq — pull request #1694 by robbkidd (2012-10-13 18:58:07+00:00)
Title: Fix notification for notes on a wall. (regression)

The fact that Notes on Walls have a noteable_type value of "nil" got
lost in the refactoring of the observer.

Fixes [regression issue](https://github.com/gitlabhq/gitlabhq/commit/16ceae895e32c2474de04c42307d914bf9a4c304#commitcomment-1991187) identified by @riyad that I introduced (#1675) with the MailerObserver -> NoteObserver refactoring.