[glib] GI annotation for g_get_charset()

[Sébastien Wilmet <swilmet src gnome org>]

commit 59c0ff48257b812ad4542c914372fcc646abb0df
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Oct 5 15:12:25 2014 +0200

    GI annotation for g_get_charset()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=736914

 glib/gcharset.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/glib/gcharset.c b/glib/gcharset.c
index b1cc465..0a4b0da 100644
--- a/glib/gcharset.c
+++ b/glib/gcharset.c
@@ -152,7 +152,8 @@ charset_cache_free (gpointer data)
 
 /**
  * g_get_charset:
- * @charset: return location for character set name
+ * @charset: (out) (optional) (transfer none): return location for character set
+ *   name, or %NULL.
  *
  * Obtains the character set for the [current locale][setlocale]; you
  * might use this character set as an argument to g_convert(), to convert