[vala] (9 commits) Non-fast-forward update to branch wip/transform

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/transform' 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:

  a036175... GDBus: Handle fd_list being null
  510b798... tests: Add test for do-while statement control-flow
  daab234... tests: "??" evaluates both of sides of expression when righ
  8e0bb84... Minor clean up in visit_method_call()
  b3be1b5... Fix array (de)serialization
  acde362... API cleaning Code builder

Commits added to the branch:

  5de3fb0... GDBus: Handle fd_list being null
  5473ef2... tests: Add test for do-while statement control-flow
  aafbe1f... tests: "??" evaluates both of sides of expression when righ
  ef6c81d... Minor clean up in visit_method_call()
  d01a3d1... Fix array (de)serialization
  7763e0d... API cleaning Code builder
  b47e869... GDBus Improve property getter
  3a6568d... GDbus Improving
  a2eae0c... Fix raw variants