Prevent error when having no battery (#731)

* Prevent error when having no battery

* Send error to /dev/null instead of separate check

.local/bin/statusbar/battery

@@ -20,7 +20,7 @@ esac
 for battery in /sys/class/power_supply/BAT?
 do
 	# Get its remaining capacity and charge status.
-	capacity=$(cat "$battery"/capacity) || break
+	capacity=$(cat "$battery"/capacity 2>/dev/null) || break
 	status=$(sed "s/[Dd]ischarging/🔋/;s/[Nn]ot charging/🛑/;s/[Cc]harging/🔌/;s/[Uu]nknown/♻️/;s/[Ff]ull/⚡/" "$battery"/status)
 
 	# If it is discharging and 25% or less, we will add a ❗ as a warning.