[vala] (4 commits) Non-fast-forward update to branch tintou/cairo-gtypes

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'tintou/cairo-gtypes' 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:

  8d014af... cairo: Add missing type_id attributes guarded by GOBJECT de
  18bc79c... vapi: Add cairo-gobject binding

Commits added to the branch:

  4555ed6... codegen: Emit postconditions before free'ing local variable (*)
  c12529b... codegen: Correctly access captured parameter in preconditio (*)
  d7c6af7... cairo: Add missing type_id attributes guarded by GOBJECT de
  0a9771d... vapi: Add cairo-gobject binding

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