totemconfig: Enlarge error_string_response

... so error_reason can be fully included into parse error message.

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>
(cherry picked from commit 1d2c6e4696e559800fabca3105293ce1cf8fa433)

exec/totemconfig.c

@@ -80,7 +80,7 @@
 
 #define DEFAULT_PORT				5405
 
-static char error_string_response[512];
+static char error_string_response[768];
 
 static void add_totem_config_notification(struct totem_config *totem_config);