[gcr] gck: Define GCK_INVALID as a gulong, for easier introspection

[Stefan Walter <stefw src gnome org>]

commit 5cd9fd449042a43c0cab3edce8bb5adf00996562
Author: Stef Walter <stefw gnome org>
Date:   Sat Nov 2 13:33:40 2013 +0100

    gck: Define GCK_INVALID as a gulong, for easier introspection

 gck/gck-attributes.c |    2 +-
 gck/gck.h            |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gck/gck-attributes.c b/gck/gck-attributes.c
index 7c39229..4041dd7 100644
--- a/gck/gck-attributes.c
+++ b/gck/gck-attributes.c
@@ -1380,7 +1380,7 @@ gck_builder_clear (GckBuilder *builder)
  * GckAttribute:
  * @type: The attribute type, such as CKA_LABEL.
  * @value: (array length=length): The value of the attribute. May be NULL.
- * @length: The length of the attribute. May be G_MAXULONG if the attribute is invalid.
+ * @length: The length of the attribute. May be GCK_INVALID if the attribute is invalid.
  *
  * This structure represents a PKCS11 CK_ATTRIBUTE.
  */
diff --git a/gck/gck.h b/gck/gck.h
index b427abe..d3a54ec 100644
--- a/gck/gck.h
+++ b/gck/gck.h
@@ -100,7 +100,7 @@ struct _GckAttribute {
        gulong length;
 };
 
-#define GCK_INVALID G_MAXULONG
+#define GCK_INVALID ((gulong)-1)
 
 gboolean            gck_value_to_ulong                      (const guchar *value,
                                                              gsize length,