https://bugs.gentoo.org/742902

From 5312ab56edcc721529af6520c9ecccaa20af4cdc Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Fri, 3 Feb 2023 09:46:55 +0000
Subject: [PATCH 1/2] Fix -Wreturn-type

Signed-off-by: Sam James <sam@gentoo.org>
--- a/vaiobright.c
+++ b/vaiobright.c
@@ -110,7 +110,7 @@ static int vaiobright_get_brightness() {
     // If we're broken, try again to open it
     if (vaiobright_bslider->broken == 1) {
         if (vaiobright_open_device() == -1)
-            return;
+            return -1;
     }
 
     if (ioctl(vaiobright_bslider->sony_fd, SONYPI_IOCGBRT, &value) < 0) {
-- 
2.39.1