wayland: Fix some missing includes

The commit 90e5088 added some extra compiler warning options that were
triggering warnings when enabling the wayland build due to missing
header includes. This adds those header includes in.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
Reviewed-by: Emmanuele Bassi <ebassi@linux.intel.com>

clutter/clutter-backend.c

@@ -55,6 +55,10 @@
 #include "clutter-stage-window.h"
 #include "clutter-version.h"
 
+#ifdef HAVE_CLUTTER_WAYLAND_COMPOSITOR
+#include "wayland/clutter-wayland-compositor.h"
+#endif /* HAVE_CLUTTER_WAYLAND_COMPOSITOR */
+
 #include <cogl/cogl.h>
 
 #ifdef CLUTTER_INPUT_X11

clutter/evdev/clutter-device-manager-evdev.c

@@ -47,6 +47,7 @@
 #include "clutter-stage-manager.h"
 #include "clutter-xkb-utils.h"
 #include "clutter-backend-private.h"
+#include "clutter-evdev.h"
 
 #include "clutter-device-manager-evdev.h"
 

clutter/wayland/clutter-event-wayland.c

@@ -34,6 +34,7 @@
 
 #include "../clutter-event.h"
 #include "../clutter-main.h"
+#include "clutter-event-wayland.h"
 
 typedef struct _ClutterEventSourceWayland
 {

clutter/wayland/clutter-input-device-wayland.c

@@ -41,6 +41,7 @@
 #include "clutter-input-device-wayland.h"
 #include "clutter-backend-wayland.h"
 #include "clutter-stage-private.h"
+#include "clutter-wayland.h"
 
 #include "cogl/clutter-stage-cogl.h"
 

clutter/wayland/clutter-stage-wayland.c

@@ -36,6 +36,7 @@
 #include "clutter-stage-window.h"
 #include "clutter-stage-private.h"
 #include "clutter-event-private.h"
+#include "clutter-wayland.h"
 #include <cogl/cogl.h>
 #include <cogl/cogl-wayland-client.h>