Address review comments.

Author: anhu

src/x509.c

@@ -4860,7 +4860,9 @@ void wolfSSL_GENERAL_NAME_set0_value(WOLFSSL_GENERAL_NAME *a, int type,
 
     wolfSSL_GENERAL_NAME_type_free(a);
     a->type = type;
-    a->d.dNSName = value;
+    if (type == GEN_DNS) {
+        a->d.dNSName = value;
+    }
 }
 
 /* Frees GENERAL_NAME objects.

tests/api.c

@@ -41889,6 +41889,7 @@ static int test_wolfSSL_GENERAL_NAME_print(void)
     X509_EXTENSION* ext = NULL;
     AUTHORITY_INFO_ACCESS* aia = NULL;
     ACCESS_DESCRIPTION* ad = NULL;
+    ASN1_IA5STRING *dnsname = NULL;
 
     const unsigned char v4Addr[] = {192,168,53,1};
     const unsigned char v6Addr[] =
@@ -41943,6 +41944,17 @@ static int test_wolfSSL_GENERAL_NAME_print(void)
     X509_free(x509);
     x509 = NULL;
 
+    /* Lets test for setting as well. */
+    ExpectNotNull(gn = GENERAL_NAME_new());
+    ExpectNotNull(dnsname = ASN1_IA5STRING_new());
+    ExpectIntEQ(ASN1_STRING_set(dnsname, "example.com", -1), 1);
+    GENERAL_NAME_set0_value(gn, GEN_DNS, dnsname);
+    dnsname = NULL;
+    ExpectIntEQ(GENERAL_NAME_print(out, gn), 1);
+    XMEMSET(outbuf, 0, sizeof(outbuf));
+    ExpectIntGT(BIO_read(out, outbuf, sizeof(outbuf)), 0);
+    ExpectIntEQ(XSTRNCMP((const char*)outbuf, dnsStr, XSTRLEN(dnsStr)), 0);
+
     /* test for GEN_URI */
 
     ExpectTrue((f = XFOPEN("./certs/ocsp/root-ca-cert.pem", "rb")) != XBADFILE);