x509_print_ex:Use correct constant for nmflag comparison

The X509_FLAG_COMPAT constant is defined as a value of the
X509_print_ex() cflags argument, and so it should not be used
to compare against values for use with X509_NAME_print flags.
Use XN_FLAG_COMPAT, which has the same value, instead.
Reviewed-by: NTomas Mraz <tomas@openssl.org>
Reviewed-by: NTodd Short <todd.short@me.com>
(Merged from https://github.com/openssl/openssl/pull/19963)

crypto/x509/t_req.c

@@ -49,7 +49,7 @@ int X509_REQ_print_ex(BIO *bp, X509_REQ *x, unsigned long nmflags,
         nmindent = 12;
     }
 
-    if (nmflags == X509_FLAG_COMPAT)
+    if (nmflags == XN_FLAG_COMPAT)
         nmindent = 16;
 
     if (!(cflag & X509_FLAG_NO_HEADER)) {

crypto/x509/t_x509.c

@@ -65,7 +65,7 @@ int X509_print_ex(BIO *bp, X509 *x, unsigned long nmflags,
         nmindent = 12;
     }
 
-    if (nmflags == X509_FLAG_COMPAT) {
+    if (nmflags == XN_FLAG_COMPAT) {
         nmindent = 16;
         printok = 1;
     }