[vala] x11: fix type mismatch warning in X.Display.get_window_property

[Evan Nemerson <evann src gnome org>]

commit 22b7e1b8fb3c0c7fc78decad7e918127ef32b43c
Author: Evan Nemerson <evan coeus-group com>
Date:   Sat May 15 19:35:13 2010 -0700

    x11: fix type mismatch warning in X.Display.get_window_property
    
    Fixes bug 609561.

 vapi/x11.vapi |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/vapi/x11.vapi b/vapi/x11.vapi
index 6464014..5257a98 100644
--- a/vapi/x11.vapi
+++ b/vapi/x11.vapi
@@ -94,7 +94,7 @@ namespace X {
 		public void get_window_attributes (Window w, out WindowAttributes window_attributes_return);
 
 		[CCode (cname = "XGetWindowProperty")]
-		public int get_window_property (Window w, Atom property, long long_offset, long long_length, bool delete, Atom req_type, out Atom actual_type_return, out int actual_format_return, out ulong nitems_return, out ulong bytes_after_return, out void* prop_return);
+		public int get_window_property (Window w, Atom property, long long_offset, long long_length, bool delete, Atom req_type, out Atom actual_type_return, out int actual_format_return, out ulong nitems_return, out ulong bytes_after_return, [CCode (type = "unsigned char **")] out void* prop_return);
 
 		[CCode (cname = "XGrabButton")]
 		public int grab_button (uint button, uint modifiers, Window grab_window, bool owner_events, uint event_mask, int pointer_mode, int keyboard_mode, Window confine_to, uint cursor);