[vala] (6 commits) 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:

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

Commits added to the branch:

  db9e4ce... gee: Add missing type-arguments (*)
  b67bb03... tests/girwriter: Add missing type-argument (*)
  5ffd65e... tests: Add more "type-arguments" tests to increase coverage (*)
  5155348... vala: No need to run return_type.check() twice for method (*)
  ba0d8e9... vala: More thorough check of ValueType and set CodeNode.err (*)
  6ac079d... codegen: Actually free data when using "remove(_all)" on GL

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