[vala] (2 commits) Non-fast-forward update to branch staging

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'staging' 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:

  2c3b21b... vala: Allow unsafe assignment of integer to enum while repo
  b1a04ec... vala: Non nullable enum types are simple types

Commits added to the branch:

  9f1de7a... vala: Allow unsafe assignment of integer to enum while repo
  5041457... vala: Non nullable enum types are simple types