[vala] gdk-3.0: Window.create_similar_image_surface() returns Cairo.ImageSurface

[Rico Tzschichholz <ricotz src gnome org>]

commit 8245db7fb76df69ba62d62ab2b4793860b6e8953
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Sep 14 16:16:00 2016 +0200

    gdk-3.0: Window.create_similar_image_surface() returns Cairo.ImageSurface
    
    https://bugzilla.gnome.org/show_bug.cgi?id=768759

 vapi/gdk-3.0.vapi              |    2 +-
 vapi/metadata/Gdk-3.0.metadata |    1 +
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/vapi/gdk-3.0.vapi b/vapi/gdk-3.0.vapi
index 2703a78..0110a2e 100644
--- a/vapi/gdk-3.0.vapi
+++ b/vapi/gdk-3.0.vapi
@@ -5657,7 +5657,7 @@ namespace Gdk {
                [Version (since = "3.16")]
                public Gdk.GLContext create_gl_context () throws GLib.Error;
                [Version (since = "3.10")]
-               public Cairo.Surface create_similar_image_surface (int format, int width, int height, int 
scale);
+               public Cairo.ImageSurface create_similar_image_surface (int format, int width, int height, 
int scale);
                [Version (since = "2.22")]
                public Cairo.Surface create_similar_surface (Cairo.Content content, int width, int height);
                public void deiconify ();
diff --git a/vapi/metadata/Gdk-3.0.metadata b/vapi/metadata/Gdk-3.0.metadata
index d402374..be4edca 100644
--- a/vapi/metadata/Gdk-3.0.metadata
+++ b/vapi/metadata/Gdk-3.0.metadata
@@ -16,6 +16,7 @@ Event
         ._get_distance skip
 Window
         .add_filter skip=false
+        .create_similar_image_surface type="Cairo.ImageSurface"
         .remove_filter skip=false
         .moved_to_rect.*_rect type="Gdk.Rectangle"
 WindowRedirect skip