Add a typedef for the construction function

Reviewed-by: Rich Salz <rsalz@openssl.org>
diff --git a/ssl/statem/statem_clnt.c b/ssl/statem/statem_clnt.c
index 1ea9d75..08b1239 100644
--- a/ssl/statem/statem_clnt.c
+++ b/ssl/statem/statem_clnt.c
@@ -512,8 +512,7 @@
  *   0: Error
  */
 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
-                                         int (**confunc) (SSL *s, WPACKET *pkt),
-                                         int *mt)
+                                         confunc_f *confunc, int *mt)
 {
     OSSL_STATEM *st = &s->statem;
 
diff --git a/ssl/statem/statem_locl.h b/ssl/statem/statem_locl.h
index 16c6731..6b57b25 100644
--- a/ssl/statem/statem_locl.h
+++ b/ssl/statem/statem_locl.h
@@ -43,6 +43,8 @@
 /* Flush the write BIO */
 int statem_flush(SSL *s);
 
+typedef int (*confunc_f) (SSL *s, WPACKET *pkt);
+
 /*
  * TLS/DTLS client state machine functions
  */
@@ -51,8 +53,7 @@
 WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst);
 WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst);
 int ossl_statem_client_construct_message(SSL *s, WPACKET *pkt,
-                                         int (**confunc) (SSL *s, WPACKET *pkt),
-                                         int *mt);
+                                         confunc_f *confunc, int *mt);
 unsigned long ossl_statem_client_max_message_size(SSL *s);
 MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt);
 WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst);
@@ -65,8 +66,7 @@
 WORK_STATE ossl_statem_server_pre_work(SSL *s, WORK_STATE wst);
 WORK_STATE ossl_statem_server_post_work(SSL *s, WORK_STATE wst);
 int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
-                                         int (**confunc) (SSL *s, WPACKET *pkt),
-                                         int *mt);
+                                         confunc_f *confunc,int *mt);
 unsigned long ossl_statem_server_max_message_size(SSL *s);
 MSG_PROCESS_RETURN ossl_statem_server_process_message(SSL *s, PACKET *pkt);
 WORK_STATE ossl_statem_server_post_process_message(SSL *s, WORK_STATE wst);
diff --git a/ssl/statem/statem_srvr.c b/ssl/statem/statem_srvr.c
index 3b5d60c..009d06c 100644
--- a/ssl/statem/statem_srvr.c
+++ b/ssl/statem/statem_srvr.c
@@ -621,8 +621,7 @@
  *   0: Error
  */
 int ossl_statem_server_construct_message(SSL *s, WPACKET *pkt,
-                                         int (**confunc) (SSL *s, WPACKET *pkt),
-                                         int *mt)
+                                         confunc_f *confunc, int *mt)
 {
     OSSL_STATEM *st = &s->statem;