From 00f71442ff365d03a6aaf3403892f339371e62f0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Otto=20Kek=C3=A4l=C3=A4inen?= <otto@kekalainen.net>
Date: Sun, 1 May 2022 00:32:39 -0700
Subject: [PATCH] Fix compiler warning by including unistd
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Function sleep() is part of unistd so it should be explicitly included
to avoid compiler warning:

    implicit declaration of function ‘sleep’
    [-Wimplicit-function-declaration]
---
 demo.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/demo.c b/demo.c
index fd67ac2..215af59 100644
--- a/demo.c
+++ b/demo.c
@@ -3,6 +3,7 @@
  */
 
 #include <stdio.h>
+#include <unistd.h>
 
 int main()
 {