Stop relying on ARRAY_LENGTH being defined in wayland-util.h

Time to break a bad habit.

clients/simple-touch.c

@@ -32,6 +32,8 @@
 #include <wayland-client.h>
 #include "../shared/os-compatibility.h"
 
+#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
+
 struct touch {
 	struct wl_display *display;
 	struct wl_registry *registry;

clients/window.h

@@ -28,6 +28,8 @@
 #include <cairo.h>
 #include "../shared/config-parser.h"
 
+#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
+
 struct window;
 struct widget;
 struct display;

src/compositor.h

@@ -37,6 +37,7 @@
 #include "../shared/config-parser.h"
 #include "weston-egl-ext.h"
 
+#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
 
 struct weston_transform {
 	struct weston_matrix matrix;