[metacity] compositor: simplify dump_xserver_region

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 8445e509216b9d3abfb224df4adff502a422faa1
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sat Mar 4 17:23:35 2017 +0200

    compositor: simplify dump_xserver_region

 src/compositor/meta-compositor-xrender.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/src/compositor/meta-compositor-xrender.c b/src/compositor/meta-compositor-xrender.c
index d8bb6d7..07386b5 100644
--- a/src/compositor/meta-compositor-xrender.c
+++ b/src/compositor/meta-compositor-xrender.c
@@ -246,9 +246,6 @@ dump_xserver_region (MetaCompositorXRender *xrender,
                      const gchar           *location,
                      XserverRegion          region)
 {
-  MetaCompositor *compositor = META_COMPOSITOR (xrender);
-  MetaDisplay *display = meta_compositor_get_display (compositor);
-  Display *xdisplay = meta_display_get_xdisplay (display);
   int nrects;
   XRectangle *rects;
   XRectangle bounds;
@@ -258,7 +255,9 @@ dump_xserver_region (MetaCompositorXRender *xrender,
 
   if (region)
     {
-      rects = XFixesFetchRegionAndBounds (xdisplay, region, &nrects, &bounds);
+      rects = XFixesFetchRegionAndBounds (xrender->xdisplay, region,
+                                          &nrects, &bounds);
+
       if (nrects > 0)
         {
           int i;