Print the X509 version signed, and convert to unsigned for the hex version.

Found by tis-interpreter

Reviewed-by: Rich Salz <rsalz@openssl.org>
GH: #1754

crypto/x509/t_x509.c

diff --git a/crypto/x509/t_x509.c b/crypto/x509/t_x509.c
index feeff75..ce67046 100644
--- a/crypto/x509/t_x509.c
+++ b/crypto/x509/t_x509.c
@@ -71,8 +71,13 @@
     }
     if (!(cflag & X509_FLAG_NO_VERSION)) {
         l = X509_get_version(x);
-        if (BIO_printf(bp, "%8sVersion: %lu (0x%lx)\n", "", l + 1, l) <= 0)
-            goto err;
+        if (l >= 0 && l <= 2) {
+            if (BIO_printf(bp, "%8sVersion: %ld (0x%lx)\n", "", l + 1, (unsigned long)l) <= 0)
+                goto err;
+        } else {
+            if (BIO_printf(bp, "%8sVersion: Unknown (%ld)\n", "", l) <= 0)
+                goto err;
+        }
     }
     if (!(cflag & X509_FLAG_NO_SERIAL)) {