[vala] cairo: Fix cairo_image_surface_get_data binding

[Jürg Billeter <juergbi src gnome org>]

commit 82a79c3215f2e88f696b92a9534afe00d0daf893
Author: Michal Hruby <michal mhr gmail com>
Date:   Sun Aug 16 13:35:35 2009 +0200

    cairo: Fix cairo_image_surface_get_data binding
    
    ImageSurface.get_data() method returns unowned data.

 vapi/cairo.vapi |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/vapi/cairo.vapi b/vapi/cairo.vapi
index 40a2d9b..d43c852 100644
--- a/vapi/cairo.vapi
+++ b/vapi/cairo.vapi
@@ -460,7 +460,7 @@ namespace Cairo {
 		[CCode (cname = "cairo_image_surface_create_for_data")]
 		public ImageSurface.for_data ([CCode (array_length = false)] uchar[] data, Format format, int width, int height, int stride);
 		[CCode (array_length = false)]
-		public uchar[] get_data ();
+		public weak uchar[] get_data ();
 		public Format get_format ();
 		public int get_width ();
 		public int get_height ();