Errors are uint32_t, not unsigned long.

Change-Id: Ic2339b771d949a555b8d05a3b24dc2e990b9d8d3
Reviewed-on: https://boringssl-review.googlesource.com/4555
Reviewed-by: Adam Langley <agl@google.com>

ssl/ssl_cert.c

@@ -867,7 +867,7 @@ int ssl_build_cert_chain(CERT *c, X509_STORE *chain_store, int flags) {
   STACK_OF(X509) *chain = NULL, *untrusted = NULL;
   X509 *x;
   int i, rv = 0;
-  unsigned long error;
+  uint32_t error;
 
   if (!cpk->x509) {
     OPENSSL_PUT_ERROR(SSL, ssl_build_cert_chain, SSL_R_NO_CERTIFICATE_SET);

ssl/ssl_rsa.c

@@ -611,7 +611,7 @@ int SSL_CTX_use_certificate_chain_file(SSL_CTX *ctx, const char *file) {
      * certificates. */
     X509 *ca;
     int r;
-    unsigned long err;
+    uint32_t err;
 
     SSL_CTX_clear_chain_certs(ctx);