[mutter] MonitorXrandr: Mask a BadValue error on VirtualBox.

[Adel Gadllah <agadllah src gnome org>]

commit 4883b96e0dbf3e330175b5ab37869fd4d26ba0b9
Author: Colin Guthrie <colin mageia org>
Date:   Mon Sep 2 16:09:22 2013 +0100

    MonitorXrandr: Mask a BadValue error on VirtualBox.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=707563

 src/core/monitor-xrandr.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/core/monitor-xrandr.c b/src/core/monitor-xrandr.c
index 5178801..cd9cf82 100644
--- a/src/core/monitor-xrandr.c
+++ b/src/core/monitor-xrandr.c
@@ -651,11 +651,13 @@ output_set_presentation_xrandr (MetaMonitorManagerXrandr *manager_xrandr,
   MetaDisplay *display = meta_get_display ();
   int value = presentation;
 
+  meta_error_trap_push (display);
   XRRChangeOutputProperty (manager_xrandr->xdisplay,
                            (XID)output->output_id,
                            display->atom__MUTTER_PRESENTATION_OUTPUT,
                            XA_CARDINAL, 32, PropModeReplace,
                            (unsigned char*) &value, 1);
+  meta_error_trap_pop (display);
 }
 
 static void