[glib] gobject: Deprecate GParameter

[Philip Withnall <pwithnall src gnome org>]

commit 2646c2173551c699c0459c95f49ec8b6fc0bf66d
Author: Fabian Orccon <cfoch fabian gmail com>
Date:   Thu Jan 26 19:45:17 2017 -0500

    gobject: Deprecate GParameter
    
    GParameter is a rarely used type and not introspectible.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=709865

 gobject/gparam.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gobject/gparam.h b/gobject/gparam.h
index 7584d5d..e496d1d 100644
--- a/gobject/gparam.h
+++ b/gobject/gparam.h
@@ -267,6 +267,8 @@ struct _GParamSpecClass
  * 
  * The GParameter struct is an auxiliary structure used
  * to hand parameter name/value pairs to g_object_newv().
+ *
+ * Deprecated: 2.52: This type is not introspectable.
  */
 struct _GParameter /* auxiliary structure for _setv() variants */
 {