[gtk-mac-integration] (2 commits) ...Merge Mitsutoshi Aoe's 'invalid-image-alphainfo'.

From: John Ralls <jralls src gnome org>
To: commits-list gnome org
Cc:
Subject: [gtk-mac-integration] (2 commits) ...Merge Mitsutoshi Aoe's 'invalid-image-alphainfo'.
Date: Sun, 10 Jun 2018 16:38:13 +0000 (UTC)

Summary of changes:

  365bfef... Fix invalid image alphaInfo error
  16bb0b0... Merge Mitsutoshi Aoe's 'invalid-image-alphainfo'.