[vala] gdk-pixbuf-2.0: make return value of Gdk.Pixbuf.flip nullable

[Evan Nemerson <evann src gnome org>]

commit 96f04c1e716b1ce047d93163e9092e27df0e33aa
Author: Evan Nemerson <evan coeus-group com>
Date:   Fri Feb 4 12:12:06 2011 -0800

    gdk-pixbuf-2.0: make return value of Gdk.Pixbuf.flip nullable

 vapi/gdk-pixbuf-2.0.vapi                           |    2 +-
 .../gdk-pixbuf-2.0/gdk-pixbuf-2.0.metadata         |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/vapi/gdk-pixbuf-2.0.vapi b/vapi/gdk-pixbuf-2.0.vapi
index 27e6f37..339a2eb 100644
--- a/vapi/gdk-pixbuf-2.0.vapi
+++ b/vapi/gdk-pixbuf-2.0.vapi
@@ -15,7 +15,7 @@ namespace Gdk {
 		public void copy_area (int src_x, int src_y, int width, int height, Gdk.Pixbuf dest_pixbuf, int dest_x, int dest_y);
 		public static GLib.Quark error_quark ();
 		public void fill (uint32 pixel);
-		public Gdk.Pixbuf flip (bool horizontal);
+		public Gdk.Pixbuf? flip (bool horizontal);
 		[CCode (has_construct_function = false)]
 		public Pixbuf.from_data ([CCode (array_length = false)] uint8[] data, Gdk.Colorspace colorspace, bool has_alpha, int bits_per_sample, int width, int height, int rowstride, Gdk.PixbufDestroyNotify? destroy_fn);
 		[CCode (has_construct_function = false)]
diff --git a/vapi/packages/gdk-pixbuf-2.0/gdk-pixbuf-2.0.metadata b/vapi/packages/gdk-pixbuf-2.0/gdk-pixbuf-2.0.metadata
index fa9190d..c016e98 100644
--- a/vapi/packages/gdk-pixbuf-2.0/gdk-pixbuf-2.0.metadata
+++ b/vapi/packages/gdk-pixbuf-2.0/gdk-pixbuf-2.0.metadata
@@ -23,7 +23,7 @@ gdk_pixbuf_save_to_callbackv.option_keys is_array="1"
 gdk_pixbuf_save_to_callbackv.option_values is_array="1"
 gdk_pixbuf_scale_simple transfer_ownership="1"
 gdk_pixbuf_rotate_simple transfer_ownership="1"
-gdk_pixbuf_flip transfer_ownership="1"
+gdk_pixbuf_flip nullable="1" transfer_ownership="1"
 gdk_pixbuf_loader_write.buf type_name="uint8" is_array="1" array_length_type="gsize"
 gdk_pixbuf_loader_write.count hidden="1"
 GdkPixbufDestroyNotify.pixels type_name="uint8" is_array="1" no_array_length="1"