ClutterStage: Use non-generic marshaller for ::presented signal

This signal runs often, so it's better to use a direct marshaler.

https://bugzilla.gnome.org/show_bug.cgi?id=782344

clutter/clutter/clutter-marshal.list

@@ -17,6 +17,7 @@ VOID:BOXED,FLAGS
 VOID:INT
 VOID:INT64,INT64,FLOAT,BOOLEAN
 VOID:INT,INT
+VOID:INT,POINTER
 VOID:FLOAT,FLOAT
 VOID:INT,INT,INT,INT
 VOID:OBJECT

clutter/clutter/clutter-stage.c

@@ -2176,8 +2176,8 @@ clutter_stage_class_init (ClutterStageClass *klass)
     g_signal_new (I_("presented"),
                   G_TYPE_FROM_CLASS (gobject_class),
                   G_SIGNAL_RUN_LAST,
-                  0,
-                  NULL, NULL, NULL,
+                  0, NULL, NULL,
+                  _clutter_marshal_VOID__INT_POINTER,
                   G_TYPE_NONE, 2,
                   G_TYPE_INT, G_TYPE_POINTER);