net.http: fix compilation of trivial examples with v -cflags -Werror

Author: spytheman

vlib/net/http/backend_nix.c.v

@@ -12,8 +12,7 @@ const (
 
 fn (req &Request) ssl_do(port int, method Method, host_name string, path string) ?Response {
 	// ssl_method := C.SSLv23_method()
-	ssl_method := C.TLSv1_2_method()
-	ctx := C.SSL_CTX_new(ssl_method)
+	ctx := C.SSL_CTX_new(C.TLSv1_2_method())
 	C.SSL_CTX_set_verify_depth(ctx, 4)
 	flags := C.SSL_OP_NO_SSLv2 | C.SSL_OP_NO_SSLv3 | C.SSL_OP_NO_COMPRESSION
 	C.SSL_CTX_set_options(ctx, flags)
@@ -24,21 +23,21 @@ fn (req &Request) ssl_do(port int, method Method, host_name string, path string)
 	ssl := &openssl.SSL(0)
 	C.BIO_get_ssl(web, &ssl)
 	preferred_ciphers := 'HIGH:!aNULL:!kRSA:!PSK:!SRP:!MD5:!RC4'
-	res = C.SSL_set_cipher_list(ssl, preferred_ciphers.str)
+	res = C.SSL_set_cipher_list(voidptr(ssl), preferred_ciphers.str)
 	if res != 1 {
 		println('http: openssl: cipher failed')
 	}
-	res = C.SSL_set_tlsext_host_name(ssl, host_name.str)
+	res = C.SSL_set_tlsext_host_name(voidptr(ssl), host_name.str)
 	res = C.BIO_do_connect(web)
 	if res != 1 {
 		return error('cannot connect the endpoint')
 	}
 	res = C.BIO_do_handshake(web)
-	C.SSL_get_peer_certificate(ssl)
-	res = C.SSL_get_verify_result(ssl)
+	C.SSL_get_peer_certificate(voidptr(ssl))
+	res = C.SSL_get_verify_result(voidptr(ssl))
 	// /////
 	req_headers := req.build_request_headers(method, host_name, path)
-	//println(req_headers)
+	// println(req_headers)
 	C.BIO_puts(web, req_headers.str)
 	mut content := strings.new_builder(100)
 	mut buff := [bufsize]byte{}