Various clean-ups

Add a check for NULL return in t1_lib.c.
    Since return type of ssl_cert_lookup_by_idx is pointer and unify coding
    style, I changed from zero to NULL in ssl_cert.c.

Remove unnecessary space for ++.

Fix incorrect condition
    Expression is always false because 'else if' condition matches previous
    condition.  SInce the next line of 'else if' condition has substituted
    TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2, the 'else if'
    condition should compare with NID_X9_62_characteristic_two_field.

Reviewed-by: Andy Polyakov <appro@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/4562)

1 files changed, 1 insertions, 1 deletions

diff --git a/ssl/ssl_cert.c b/ssl/ssl_cert.c
index 3de3c2c7c5..43b084d607 100644
--- a/ssl/ssl_cert.c
+++ b/ssl/ssl_cert.c
@@ -1002,6 +1002,6 @@ const SSL_CERT_LOOKUP *ssl_cert_lookup_by_pkey(const EVP_PKEY *pk, size_t *pidx)
 const SSL_CERT_LOOKUP *ssl_cert_lookup_by_idx(size_t idx)
 {
     if (idx >= OSSL_NELEM(ssl_cert_info))
-        return 0;
+        return NULL;
     return &ssl_cert_info[idx];
 }