[mutter] Created tag 3.9.1

[Florian Müllner <fmuellner src gnome org>]

The unsigned tag '3.9.1' was created.

Tagger: Florian Müllner <fmuellner gnome org>
Date: Wed May 1 00:00:35 2013 +0200

    Tag release 3.9.1

Changes since the last tag '3.8.1':

Florian Müllner (1):
      Bump version to 3.9.1

Pavel Vasin (3):
      barrier: Fix memory leak
      background: Fix memory leak
      window: Add missing chain-up for finalize()

Simon McVittie (1):
      Let the UI layer (via the core) construct the frame mask

Stef Walter (1):
      Fix use of uninitialized variables