Don't test heartbeats when there aren't any.

Reviewed-by: Richard Levitte <levitte@openssl.org>

ssl/ssl_locl.h

@@ -1826,8 +1826,10 @@ const SSL_METHOD *func_name(void)  \
 struct openssl_ssl_test_functions {
     int (*p_ssl_init_wbio_buffer) (SSL *s, int push);
     int (*p_ssl3_setup_buffers) (SSL *s);
+# ifndef OPENSSL_NO_HEARTBEATS
     int (*p_dtls1_process_heartbeat) (SSL *s,
         unsigned char *p, unsigned int length);
+# endif
 };
 
 # ifndef OPENSSL_UNIT_TEST

ssl/ssl_utst.c

@@ -59,7 +59,9 @@
 static const struct openssl_ssl_test_functions ssl_test_functions = {
     ssl_init_wbio_buffer,
     ssl3_setup_buffers,
+# ifndef OPENSSL_NO_HEARTBEATS
     dtls1_process_heartbeat
+# endif
 };
 
 const struct openssl_ssl_test_functions *SSL_test_functions(void)