[mutter] meta_quit: ignore repeated calls after it's already quitting

[Dan Winship <danw src gnome org>]

commit c70087db0c17cf205a5922d30771a1e3f91b25af
Author: Dan Winship <danw gnome org>
Date:   Mon Jun 6 16:18:09 2011 -0400

    meta_quit: ignore repeated calls after it's already quitting
    
    meta_run() calls meta_finalize() after the main loop exits, which ends
    up calling meta_display_close(), which calls
    meta_quit(META_EXIT_SUCCESS), meaning that any exit status passed to
    the original meta_quit() call is lost.
    
    Fix this by ignoring meta_quit() calls after the main loop is no
    longer running.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=652010

 src/core/main.c |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/core/main.c b/src/core/main.c
index c7fe290..b5c8e09 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -571,10 +571,11 @@ meta_run (void)
 void
 meta_quit (MetaExitCode code)
 {
-  meta_exit_code = code;
-
   if (g_main_loop_is_running (meta_main_loop))
-    g_main_loop_quit (meta_main_loop);
+    {
+      meta_exit_code = code;
+      g_main_loop_quit (meta_main_loop);
+    }
 }
 
 /**