[gobject-introspection] gir: Update annotations from GLib git master

[Jonh Wendell <jwendell src gnome org>]

commit 083c152f41996ba92cbb6616ed0b1fe51bb9b92c
Author: Jonh Wendell <jonh wendell redhat com>
Date:   Sun Sep 18 17:43:18 2016 -0300

    gir: Update annotations from GLib git master

 gir/glib-2.0.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gir/glib-2.0.c b/gir/glib-2.0.c
index 639d0d8..9e0b51b 100644
--- a/gir/glib-2.0.c
+++ b/gir/glib-2.0.c
@@ -19640,7 +19640,7 @@
 
 /**
  * g_log_variant:
- * @log_domain: log domain, usually %G_LOG_DOMAIN
+ * @log_domain: (allow-none): log domain, usually %G_LOG_DOMAIN
  * @log_level: log level, either from #GLogLevelFlags, or a user-defined
  *    level
  * @fields: a dictionary (#GVariant of the type %G_VARIANT_TYPE_VARDICT)