[mutter] background: Fix meta_background_new

[Jasper St. Pierre <jstpierre src gnome org>]

commit 3ea6424b8f839ca55c05630fa51579d2adc7c52c
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Wed Sep 3 19:55:05 2014 -0700

    background: Fix meta_background_new
    
    This is used by the default plugin.

 src/compositor/meta-background.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/compositor/meta-background.c b/src/compositor/meta-background.c
index 938ef6a..cbcbdea 100644
--- a/src/compositor/meta-background.c
+++ b/src/compositor/meta-background.c
@@ -812,7 +812,7 @@ MetaBackground *
 meta_background_new  (MetaScreen *screen)
 {
   return g_object_new (META_TYPE_BACKGROUND,
-                       "screen", screen,
+                       "meta-screen", screen,
                        NULL);
 }