Change the paint forcing on the Text cache text

The changes in the master clock and the repaint cycle have been
changed, and broke the way the test for the Text actor cache of
PangoLayouts forces a redraw.

We have to call clutter_actor_paint() on the Stage embedding the
Text actor we want to test; this is kinda fugly because if the
Layout has changed it will end up causing a reallocation cycle
in the middle of the Text actor paint. Since it's a test case,
and since forcing redraws is a bit of a hack as well, we can
close both our eyes on that.

tests/conform/test-text-cache.c

@@ -49,7 +49,14 @@ on_paint (ClutterActor *label, CallbackData *data)
 static void
 force_redraw (CallbackData *data)
 {
-  clutter_redraw (CLUTTER_STAGE (clutter_actor_get_stage (data->label)));
+  /* XXX - this is fugly; we force a paint on the stage, which
+   * will then paint the Text actor. inside the Text actor we
+   * check for a Layout with the allocation size. if the allocation
+   * has changed it will cause a relayout in the middle of the
+   * paint, which is expensive and broken. this will ensure that
+   * the test passes, though
+   */
+  clutter_actor_paint (clutter_actor_get_stage (data->label));
 }
 
 static gboolean