[perl-Gtk2] Fix version check to refer to stable version

[Torsten Schönfeld <tsch src gnome org>]

commit 60f0e0bacc7800e1470e4ae1e8968fa37493afb9
Author: Torsten Schönfeld <kaffeetisch gmx de>
Date:   Thu Apr 22 22:18:15 2010 +0200

    Fix version check to refer to stable version

 xs/GdkColor.xs |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/xs/GdkColor.xs b/xs/GdkColor.xs
index 6e81123..27fbfdd 100644
--- a/xs/GdkColor.xs
+++ b/xs/GdkColor.xs
@@ -278,7 +278,7 @@ gdk_color_blue (color)
     OUTPUT:
     	RETVAL
 
-#if GTK_CHECK_VERSION (2, 11, 0)
+#if GTK_CHECK_VERSION (2, 12, 0)
 
 gchar_own * gdk_color_to_string (const GdkColor *color);