[mutter] tests/stage-view-tests: Make 'wait_for_paint()' block

[Marge Bot <marge-bot src gnome org>]

commit b838ba8166bf9af170181a59aafa1c5bbc98b915
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Feb 8 18:39:11 2021 +0100

    tests/stage-view-tests: Make 'wait_for_paint()' block
    
    Otherwise it's a busy loop, skipping any poll():ing.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1719>

 src/tests/stage-view-tests.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/tests/stage-view-tests.c b/src/tests/stage-view-tests.c
index 8e680eff00..9604a4ab59 100644
--- a/src/tests/stage-view-tests.c
+++ b/src/tests/stage-view-tests.c
@@ -128,7 +128,7 @@ wait_for_paint (ClutterActor *stage)
                                      &was_painted);
 
   while (!was_painted)
-    g_main_context_iteration (NULL, FALSE);
+    g_main_context_iteration (NULL, TRUE);
 
   g_signal_handler_disconnect (stage, was_painted_id);
 }