[mutter] screen-cast/monitor-src: Always set before-paint watch

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

commit 10d1de2bdf559de77b5fc89c6338f8606e63aaa1
Author: Michel Dänzer <mdaenzer redhat com>
Date:   Fri Jun 25 18:29:06 2021 +0200

    screen-cast/monitor-src: Always set before-paint watch
    
    We weren't setting it for META_SCREEN_CAST_CURSOR_MODE_EMBEDDED, so
    that case didn't work correctly with scanouts.
    
    Suggested by Georges Basile Stavracas Neto.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1914>

 src/backends/meta-screen-cast-monitor-stream-src.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/backends/meta-screen-cast-monitor-stream-src.c 
b/src/backends/meta-screen-cast-monitor-stream-src.c
index b85c44fe12..ac6be6730f 100644
--- a/src/backends/meta-screen-cast-monitor-stream-src.c
+++ b/src/backends/meta-screen-cast-monitor-stream-src.c
@@ -340,13 +340,14 @@ reattach_watches (MetaScreenCastMonitorStreamSrc *monitor_src)
     meta_stage_remove_watch (META_STAGE (stage), l->data);
   g_clear_pointer (&monitor_src->watches, g_list_free);
 
+  add_view_watches (monitor_src,
+                    META_STAGE_WATCH_BEFORE_PAINT,
+                    before_stage_painted);
+
   switch (meta_screen_cast_stream_get_cursor_mode (stream))
     {
     case META_SCREEN_CAST_CURSOR_MODE_METADATA:
     case META_SCREEN_CAST_CURSOR_MODE_HIDDEN:
-      add_view_watches (monitor_src,
-                        META_STAGE_WATCH_BEFORE_PAINT,
-                        before_stage_painted);
       add_view_watches (monitor_src,
                         META_STAGE_WATCH_AFTER_ACTOR_PAINT,
                         stage_painted);