acpid: fix backlight stepping for low values of max_brightness

appearently, max_brightness can be as low as 15, which makes the integer
division round down to 0.

Fixes: c101203b25 ("acpid: cleanup handler")
Reported-by: slotThe <soliditsallgood@mailbox.org>
Signed-off-by: Piraty <piraty1@inbox.ru>

srcpkgs/acpid/files/handler.sh

@@ -9,6 +9,7 @@ step_backlight() {
     for backlight in /sys/class/backlight/*/; do
         [ -d "$backlight" ] || continue
         step=$(( $(cat "$backlight/max_brightness") / 20 ))
+        [ "$step" -gt "1" ] || step=1 #fallback if gradation is too low
         printf '%s' "$(( $(cat "$backlight/brightness") $1 step ))" >"$backlight/brightness"
     done
 }

srcpkgs/acpid/template

@@ -1,7 +1,7 @@
 # Template file for 'acpid'
 pkgname=acpid
 version=2.0.33
-revision=1
+revision=2
 build_style=gnu-configure
 short_desc="ACPI Daemon (acpid) With Netlink Support"
 maintainer="Enno Boland <gottox@voidlinux.org>"