[mutter] monitor-config-store: Maybe force save configuration on tear down

[Jonas Ådahl <jadahl src gnome org>]

commit 8b022a5595f7191f2110ebaa793c8143359e14be
Author: Jonas Ådahl <jadahl gmail com>
Date:   Mon Sep 11 11:26:03 2017 +0800

    monitor-config-store: Maybe force save configuration on tear down
    
    If there is a pending config file content replacement in progress on
    tear down, cancel it and save it synchronously to avoid any data loss.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787477

 src/backends/meta-monitor-config-store.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/src/backends/meta-monitor-config-store.c b/src/backends/meta-monitor-config-store.c
index a33ef75..d184b3d 100644
--- a/src/backends/meta-monitor-config-store.c
+++ b/src/backends/meta-monitor-config-store.c
@@ -1434,6 +1434,14 @@ meta_monitor_config_store_dispose (GObject *object)
 {
   MetaMonitorConfigStore *config_store = META_MONITOR_CONFIG_STORE (object);
 
+  if (config_store->save_cancellable)
+    {
+      g_cancellable_cancel (config_store->save_cancellable);
+      g_clear_object (&config_store->save_cancellable);
+
+      meta_monitor_config_store_save_sync (config_store);
+    }
+
   g_clear_pointer (&config_store->configs, g_hash_table_destroy);
 
   g_clear_object (&config_store->user_file);