Stop warning about use of *printf() without a format.

apps/engine.c

@@ -247,7 +247,7 @@ static int util_verbose(ENGINE *e, int verbose, BIO *bio_out, const char *indent
                         /* Now decide on the output */
                         if(xpos == 0)
                                 /* Do an indent */
-                                xpos = BIO_printf(bio_out, indent);
+                                xpos = BIO_puts(bio_out, indent);
                         else
                                 /* Otherwise prepend a ", " */
                                 xpos += BIO_printf(bio_out, ", ");
@@ -258,7 +258,7 @@ static int util_verbose(ENGINE *e, int verbose, BIO *bio_out, const char *indent
 					(xpos + (int)strlen(name) > line_wrap))
                                         {
                                         BIO_printf(bio_out, "\n");
-                                        xpos = BIO_printf(bio_out, indent);
+                                        xpos = BIO_puts(bio_out, indent);
                                         }
                                 xpos += BIO_printf(bio_out, "%s", name);
                                 }

apps/s_client.c

@@ -237,7 +237,7 @@ static unsigned int psk_client_cb(SSL *ssl, const char *hint, char *identity,
 		BIO_printf(bio_c_out, "Received PSK identity hint '%s'\n", hint);
 
 	/* lookup PSK identity and PSK key based on the given identity hint here */
-	ret = BIO_snprintf(identity, max_identity_len, psk_identity);
+	ret = BIO_snprintf(identity, max_identity_len, "%s", psk_identity);
 	if (ret < 0 || (unsigned int)ret > max_identity_len)
 		goto out_err;
 	if (c_debug)