[mutter] (11 commits) Non-fast-forward update to branch gbsneto/effects-paint-nodes

[Marge Bot <marge-bot src gnome org>]

The branch 'gbsneto/effects-paint-nodes' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  dc7d7ad... clutter/paint-node: Walk up paint node tree to find framebu
  1f1d43e... Introduce ClutterEffectNode
  ca16f71... clutter/effect: Add paint_node vfunc
  b58deb2... clutter/paint-nodes: Add opacity overriding to ClutterActor
  b566f40... clutter/paint-nodes: Add new ClutterLayerNode API
  b796650... clutter/paint-nodes: Add serialization to layer node
  5c9ea8b... Introduce ClutterBlitNode

Commits added to the branch:

  517dc99... Update Portuguese translation (*)
  14ab90e... clutter/actor: Initialize out variable (*)
  745ccc5... compositor: Fix warning with -Wmaybe-uninitialized (*)
  20ac791... backends/native: Avoid -Wmaybe-uninitialized warning (*)
  3c8bfc1... clutter/paint-node: Walk up paint node tree to find framebu
  e45d1c6... Introduce ClutterEffectNode
  5c772a6... clutter/effect: Add paint_node vfunc
  89f9be0... clutter/paint-nodes: Add opacity overriding to ClutterActor
  63ea2da... clutter/paint-nodes: Add new ClutterLayerNode API
  4c75389... clutter/paint-nodes: Add serialization to layer node
  033423f... Introduce ClutterBlitNode

(*) This commit already existed in another branch; no separate mail sent