pluto: Properly initialize constants.

src/pluto/demux.c

@@ -966,7 +966,9 @@ malloc_md(void)
 	 * - .note = NOTHING_WRONG
 	 * - .encrypted = FALSE
 	 */
-	static const struct msg_digest blank_md;
+	static const struct msg_digest blank_md = {
+		.next = NULL,
+	};
 
 	if (md == NULL)
 	{

src/pluto/state.c

@@ -166,7 +166,10 @@ static struct state **state_hash(const u_char *icookie, const u_char *rcookie,
  */
 struct state *new_state(void)
 {
-	static const struct state blank_state;      /* initialized all to zero & NULL */
+	/* initialized all to zero & NULL */
+	static const struct state blank_state = {
+		.st_serialno = 0,
+	};
 	static so_serial_t next_so = SOS_FIRST;
 	struct state *st;