Fix ecparam -genkey with point compression or DER outform

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from openssl#5741)

(cherry picked from commit 4bdc25b)

Author: bernd-edlinger

apps/ecparam.c

@@ -393,6 +393,9 @@ int ecparam_main(int argc, char **argv)
                         "}\n");
     }
 
+    if (outformat == FORMAT_ASN1 && genkey)
+        noout = 1;
+
     if (!noout) {
         if (outformat == FORMAT_ASN1)
             i = i2d_ECPKParameters_bio(out, group);
@@ -428,6 +431,9 @@ int ecparam_main(int argc, char **argv)
             goto end;
         }
 
+        if (new_form)
+            EC_KEY_set_conv_form(eckey, form);
+
         if (!EC_KEY_generate_key(eckey)) {
             BIO_printf(bio_err, "unable to generate key\n");
             EC_KEY_free(eckey);