Merge branch 'binding-unbind-annotation' into 'master'

Fix annotation of g_binding_unbind() to transfer-full

See merge request GNOME/glib!197
diff --git a/gobject/gbinding.c b/gobject/gbinding.c
index 899dc84..6872b96 100644
--- a/gobject/gbinding.c
+++ b/gobject/gbinding.c
@@ -748,7 +748,7 @@
 
 /**
  * g_binding_unbind:
- * @binding: a #GBinding
+ * @binding: (transfer full): a #GBinding
  *
  * Explicitly releases the binding between the source and the target
  * property expressed by @binding.