[vala] Non-fast-forward update to branch wip/issue/1238

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/issue/1238' 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:

  d7a95e2... codegen: Actually free data when using "remove(_all)" on GL

Commits added to the branch:

  dca6f6a... codegen: Actually free data when using "remove(_all)" on GL (*)

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