From 96d7a172f50fbd51da9644ae2ddd9ce43b0a7666 Mon Sep 17 00:00:00 2001
From: xiehan <52160700+Barenboim@users.noreply.github.com>
Date: Tue, 2 Aug 2022 20:20:40 +0800
Subject: [PATCH] Update tutorial-09-http_file_server.cc

---
 tutorial/tutorial-09-http_file_server.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tutorial/tutorial-09-http_file_server.cc b/tutorial/tutorial-09-http_file_server.cc
index 67dd96fd..210804a2 100644
--- a/tutorial/tutorial-09-http_file_server.cc
+++ b/tutorial/tutorial-09-http_file_server.cc
@@ -140,7 +140,7 @@ int main(int argc, char *argv[])
 		if (*buf == '\0')
 		{
 			printf("\n");
-			return nullptr;
+			return NULL;
 		}
 
 		std::string url = scheme + "127.0.0.1:" + std::to_string(port) + "/" + buf;