[mutter] (5 commits) Non-fast-forward update to branch wip/fmuellner/fix-gjs-warnings

[Florian Müllner <fmuellner src gnome org>]

The branch 'wip/fmuellner/fix-gjs-warnings' 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:

  7382101... clutter: Don't reference invalid pc in gir
  2a070b9... window-group: Remove undefined function declaration
  8b583e9... build: Introspect some more types

Commits added to the branch:

  52fdd24... wayland: avoid a crash in is_effectively_synchronized() (*)
  33c2a38... main: Fix typo (*)
  f725319... clutter: Don't reference invalid pc in gir
  e215681... window-group: Remove undefined function declaration
  2631f3c... build: Introspect some more types

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