[vala] (3 commits) Non-fast-forward update to branch wip/issue/1167

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/issue/1167' 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:

  52c3ada... tests/girwriter: Add tests for implicit parameters in virtu
  1c137f6... girwriter: Don't use instance-parameter inside callback

Commits added to the branch:

  5aed642... codegen: Improve handling of ellipsis parameter in get_ccod
  61dd288... tests/girwriter: Add tests for implicit parameters in virtu
  3945356... girwriter: Don't use instance-parameter inside callback