[cogl] wayland-winsys: Provide a wl_registry.global_remove callback

[Rui Matos <rtcm src gnome org>]

commit 18b7440a429833a5ec6af7850ab50eb9f2d221aa
Author: Rui Matos <tiagomatos gmail com>
Date:   Tue Jan 27 18:21:47 2015 +0100

    wayland-winsys: Provide a wl_registry.global_remove callback
    
    Otherwise libwayland-client will abort() when we get that event.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=743594

 cogl/winsys/cogl-winsys-egl-wayland.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/cogl/winsys/cogl-winsys-egl-wayland.c b/cogl/winsys/cogl-winsys-egl-wayland.c
index 6a68bd6..a0f3f34 100644
--- a/cogl/winsys/cogl-winsys-egl-wayland.c
+++ b/cogl/winsys/cogl-winsys-egl-wayland.c
@@ -115,6 +115,14 @@ registry_handle_global_cb (void *data,
 }
 
 static void
+registry_handle_global_remove_cb (void *data,
+                                  struct wl_registry *registry,
+                                  uint32_t name)
+{
+  /* Nothing to do for now */
+}
+
+static void
 _cogl_winsys_renderer_disconnect (CoglRenderer *renderer)
 {
   CoglRendererEGL *egl_renderer = renderer->winsys;
@@ -137,6 +145,7 @@ _cogl_winsys_renderer_disconnect (CoglRenderer *renderer)
 
 static const struct wl_registry_listener registry_listener = {
   registry_handle_global_cb,
+  registry_handle_global_remove_cb
 };
 
 static int64_t