[gnome-session] gsm-util: fix leak in new gsm_util_save_environment function

[Ray Strode <halfline src gnome org>]

commit a50a182ef66c58896ba6d8a5d393fb898ece2bbf
Author: Ray Strode <rstrode redhat com>
Date:   Thu Sep 17 08:03:10 2015 -0400

    gsm-util: fix leak in new gsm_util_save_environment function
    
    gsm_util_save_environment calls g_get_environ() without calling
    g_strfreev() on the result.
    
    This commit addresses the problem by using the environ external
    variable, directly, instead, and avoiding the allocation
    altogether.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=738205

 gnome-session/gsm-util.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/gnome-session/gsm-util.c b/gnome-session/gsm-util.c
index bca1b38..52774e7 100644
--- a/gnome-session/gsm-util.c
+++ b/gnome-session/gsm-util.c
@@ -32,6 +32,8 @@
 
 #include "gsm-util.h"
 
+extern char **environ;
+
 static gchar *_saved_session_dir = NULL;
 
 char *
@@ -467,7 +469,7 @@ gsm_util_save_environment (void)
                 return;
         }
 
-        environment = g_variant_new_bytestring_array ((const gchar * const *) g_get_environ (), -1);
+        environment = g_variant_new_bytestring_array ((const gchar * const *) environ, -1);
         size = g_variant_get_size (environment);
         environment_data = g_variant_get_data (environment);