[glib] gvarianttype: fix a trivial missing const

[Ryan Lortie <ryanl src gnome org>]

commit 2f4bc34b324505cc6b196a9793b71e8455fe8540
Author: Ryan Lortie <desrt desrt ca>
Date:   Sat Jan 30 00:00:48 2010 -0500

    gvarianttype: fix a trivial missing const

 glib/gvarianttype.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/glib/gvarianttype.c b/glib/gvarianttype.c
index 6a43fe2..deef7ed 100644
--- a/glib/gvarianttype.c
+++ b/glib/gvarianttype.c
@@ -581,7 +581,7 @@ g_variant_type_string_scan (const gchar  *string,
 gboolean
 g_variant_type_string_is_valid (const gchar *type_string)
 {
-  gchar *endptr;
+  const gchar *endptr;
 
   g_return_val_if_fail (type_string != NULL, FALSE);