zsh: prompt: fix battery display on computers without acpi

zsh/prompt.zsh

@@ -59,7 +59,6 @@ zshrc_prompt_precmd() {
 	local battery_pct=
 	if type acpi &> /dev/null ; then
 		battery_pct="$(acpi -b | cut -d, -f2 | sed -e 's/[^0-9]//g')"
-	fi
 
 		# colorize battery percentage or display status
 		if [[ $(acpi -a | cut -d':' -f2) == " on-line" ]]; then
@@ -71,6 +70,7 @@ zshrc_prompt_precmd() {
 		else
 			battery_pct="%F{green}${battery_pct}%%%f"
 		fi
+	fi
 
 	# prefix characters in first and second line
 	local top_prefix="%F{cyan}${top_left_corner}%f"