[vala/staging] x11: Add binding for XCreateSimpleWindow

[Rico Tzschichholz <ricotz src gnome org>]

commit de01c082135a0a34dd2ae8e58264e76fb82dec2b
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Sep 19 12:39:23 2018 +0200

    x11: Add binding for XCreateSimpleWindow

 vapi/x11.vapi | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/vapi/x11.vapi b/vapi/x11.vapi
index b0448033f..2215cd172 100644
--- a/vapi/x11.vapi
+++ b/vapi/x11.vapi
@@ -519,6 +519,9 @@ namespace X {
        [CCode (cname = "XCreateWindow")]
        public Window create_window (Display display, Window parent, int x, int y, uint width, uint height, 
uint border_width, int depth, uint @class, Visual? visual, X.CW valuemask, ref SetWindowAttributes 
attributes);
 
+       [CCode (cname = "XCreateSimpleWindow")]
+       public Window create_simple_window (Display display, Window parent, int x, int y, uint width, uint 
height, uint border_width, ulong border, ulong background);
+
        [CCode (cname = "XClearWindow")]
        public int clear_window (X.Display display, X.Window w);