[vala] (5 commits) Non-fast-forward update to branch wip/bug567269

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/bug567269' 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:

  b0f6b59... Warn when using 'this' before chain up
  df59fca... Make lambdas work in chain-ups again
  85cdd0b... Allow multiple chain-up calls in the constructor
  07e662c... Allow 'static' lambdas before chainup
  451cab9... tests: Add a bunch of chain-up tests
  bd0ddcf... tests: Disable invalid chainup test while only warnings are
  a0b3096... Avoid critical
  4271ad3... tests: Add chain-up lambda regression test

Commits added to the branch:

  c424722... tests: Add chain-up lambda regression test (*)
  abaa2d5... Warn when using 'this' before chain up
  b65b335... Make lambdas work in chain-ups again
  0be1cb5... Allow multiple chain-up calls in the constructor
  a305cc3... Allow 'static' lambdas before chainup

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