[mutter] background-content: Fix an x/y mixup

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 9823a0f6c94d1fc472e4c495d619ea318f1ee597
Author: Daniel van Vugt <daniel van vugt canonical com>
Date:   Tue Jun 30 17:00:11 2020 +0800

    background-content: Fix an x/y mixup
    
    Fortunately the coordinate is local and always (0,0) so it didn't
    break anything.
    
    https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1341

 src/compositor/meta-background-content.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/compositor/meta-background-content.c b/src/compositor/meta-background-content.c
index daecf2676e..df0ab763e8 100644
--- a/src/compositor/meta-background-content.c
+++ b/src/compositor/meta-background-content.c
@@ -497,7 +497,7 @@ meta_background_content_paint_content (ClutterContent      *content,
 
   clutter_actor_get_content_box (actor, &actor_box);
   actor_pixel_rect.x = actor_box.x1;
-  actor_pixel_rect.y = actor_box.x1;
+  actor_pixel_rect.y = actor_box.y1;
   actor_pixel_rect.width = actor_box.x2 - actor_box.x1;
   actor_pixel_rect.height = actor_box.y2 - actor_box.y1;