[glib] ghash: minor docs tweak

[Ryan Lortie <desrt src gnome org>]

commit de657238774755eb58a1c6fbf9123f978fb828e7
Author: Ryan Lortie <desrt desrt ca>
Date:   Thu Dec 11 18:49:16 2014 -0500

    ghash: minor docs tweak
    
    We should not advise people to cast the result of
    g_hash_table_get_keys_as_array() to a type that looks suitable for use
    with g_strfreev().  Advise to use (const gchar **) instead.

 glib/ghash.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/glib/ghash.c b/glib/ghash.c
index b42dd14..913f739 100644
--- a/glib/ghash.c
+++ b/glib/ghash.c
@@ -1736,7 +1736,7 @@ g_hash_table_get_keys (GHashTable *hash_table)
  * %NULL was used as the value for a key.
  *
  * Note: in the common case of a string-keyed #GHashTable, the return
- * value of this function can be conveniently cast to (gchar **).
+ * value of this function can be conveniently cast to (const gchar **).
  *
  * You should always free the return result with g_free().  In the
  * above-mentioned case of a string-keyed hash table, it may be