[metacity] compositor: simplify add_damage

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 598fc3a1724c229e598f14c5a318541c2784c862
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Mar 4 18:42:29 2017 +0200

    compositor: simplify add_damage

 src/compositor/meta-compositor-xrender.c |    4 +---
 1 files changed, 1 insertions(+), 3 deletions(-)
---
diff --git a/src/compositor/meta-compositor-xrender.c b/src/compositor/meta-compositor-xrender.c
index d38b0bd..296e08d 100644
--- a/src/compositor/meta-compositor-xrender.c
+++ b/src/compositor/meta-compositor-xrender.c
@@ -1786,9 +1786,7 @@ static void
 add_damage (MetaCompositorXRender *xrender,
             XserverRegion          damage)
 {
-  MetaCompositor *compositor = META_COMPOSITOR (xrender);
-  MetaDisplay *display = meta_compositor_get_display (compositor);
-  Display *xdisplay = meta_display_get_xdisplay (display);
+  Display *xdisplay = xrender->xdisplay;
 
   /* dump_xserver_region (xrender, "add_damage", damage); */