[gcr] (2 commits) Non-fast-forward update to branch nielsdg/cn-can-be-null

[Niels De Graef <nielsdg src gnome org>]

The branch 'nielsdg/cn-can-be-null' 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:

  85d0e8d... gcr: Fix criticals if a CN is null

Commits added to the branch:

  b8d577f... meson: fix GCK version macros (*)
  b372088... gcr: Fix criticals if a CN is null

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