Fix possible uninitialized variable

git-svn-id: http://svn-archive.gnome.org/svn/NetworkManager/trunk@4095 4912f4e0-d625-0410-9fb7-b9a5a253dbdc

system-settings/plugins/keyfile/plugin.c

@@ -357,7 +357,7 @@ static char *
 plugin_get_hostname (SCPluginKeyfile *plugin)
 {
 	GKeyFile *key_file;
-	char *hostname;
+	char *hostname = NULL;
 	GError *error = NULL;
 
 	key_file = g_key_file_new ();