-/* **********************************************************************
- * Comon code
- * **********************************************************************/
-
-typedef struct {
- int dummy;
-} msg_ping_t;
-
-/* Function prototypes */
-void register_messages(void);
-
-/* Code */
-void register_messages(void) {
-
+/* register messages which may be sent (common to client and server) */
+static void register_messages(void) {