[glib] (5 commits) Non-fast-forward update to branch param-speedups2

[Matthias Clasen <matthiasc src gnome org>]

The branch 'param-speedups2' 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:

  9725b5a... param: Add a value_is_valid vfunc
  4af7b05... param: Add g_param_value_is_valid
  d113b31... Add tests for g_param_value_is_valid
  f3cc9a1... gobject: Use value_is_valid

Commits added to the branch:

  0605602... Update Catalan translation (*)
  b4560e8... param: Add a value_is_valid vfunc
  d4f3add... param: Add g_param_value_is_valid
  98739e9... Add tests for g_param_value_is_valid
  d76e5bf... gobject: Use value_is_valid

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