[pygtk] Make gtk.gdk.Pixbuf.add_alpha accept integers, not strings

[Paul Pogonyshev <paulp src gnome org>]

commit 88dfa818d5ccc4f9d570f94eea6f14814cd67ace
Author: Paul Pogonyshev <pogonyshev gmx net>
Date:   Thu Jun 18 01:06:28 2009 +0300

    Make gtk.gdk.Pixbuf.add_alpha accept integers, not strings
    
    Bug #586094.

 gtk/gdk-base.defs |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gdk-base.defs b/gtk/gdk-base.defs
index 7d1de08..34fb421 100644
--- a/gtk/gdk-base.defs
+++ b/gtk/gdk-base.defs
@@ -5301,9 +5301,11 @@
   (return-type "GdkPixbuf*")
   (parameters
     '("gboolean" "substitute_color")
-    '("guchar" "r")
-    '("guchar" "g")
-    '("guchar" "b")
+    ;; Bug #586094: actually 'guchar' in function declaration, but
+    ;; really means '8-bit integer'.
+    '("guint8" "r")
+    '("guint8" "g")
+    '("guint8" "b")
   )
 )