[vala] gobject-2.0: Add binding for g_type_get_instance_count

[Rico Tzschichholz <ricotz src gnome org>]

commit aaec83ff49ded8de3349934305e0f9f1171501d7
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Dec 1 14:23:41 2014 +0100

    gobject-2.0: Add binding for g_type_get_instance_count

 vapi/gobject-2.0.vapi |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/vapi/gobject-2.0.vapi b/vapi/gobject-2.0.vapi
index 85b1d7d..f015b3d 100644
--- a/vapi/gobject-2.0.vapi
+++ b/vapi/gobject-2.0.vapi
@@ -71,6 +71,8 @@ namespace GLib {
 
                public void query (out TypeQuery query);
 
+               public int get_instance_count ();
+
                public TypeClass class_ref ();
                public unowned TypeClass class_peek ();