[mutter] backends/x11: Fallback to the first logical monitor when out of focus

[Jonas Ådahl <jadahl src gnome org>]

commit 4e4b24e7a87ac4f331d9e4447e9bfddaf9e64c55
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Mar 6 16:26:50 2017 +0800

    backends/x11: Fallback to the first logical monitor when out of focus
    
    When running nested, the pointer can be outside of the stage, meaning
    outside of any logical monitor. Handle this when getting the current
    logical monitor by falling back to the first logical monitor when the
    pointer coordinate is outside of any logical monitor.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779001

 src/backends/x11/meta-backend-x11.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/backends/x11/meta-backend-x11.c b/src/backends/x11/meta-backend-x11.c
index 0306232..83d30d8 100644
--- a/src/backends/x11/meta-backend-x11.c
+++ b/src/backends/x11/meta-backend-x11.c
@@ -535,6 +535,9 @@ meta_backend_x11_get_current_logical_monitor (MetaBackend *backend)
   logical_monitor =
     meta_monitor_manager_get_logical_monitor_at (monitor_manager, x, y);
 
+  if (!logical_monitor && monitor_manager->logical_monitors)
+    logical_monitor = monitor_manager->logical_monitors->data;
+
   priv->cached_current_logical_monitor = logical_monitor;
   return priv->cached_current_logical_monitor;
 }