Put g_type_init() under a version check

GLib 2.36 will deprecate g_type_init() in favour of automatic
initialization through a constructor function. We need to add the
version check to avoid a compiler warning.

clutter/clutter-main.c

@@ -2835,8 +2835,10 @@ clutter_base_init (void)
       bindtextdomain (GETTEXT_PACKAGE, CLUTTER_LOCALEDIR);
       bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
 
+#if !GLIB_CHECK_VERSION (2, 35, 1)
       /* initialise GLib type system */
       g_type_init ();
+#endif
 
       /* initialise the Big Clutter Lock™ if necessary */
       clutter_threads_init_default ();