Move args check below functions in switch-theme

scripts/.local/share/scripts/switch-theme

@@ -1,13 +1,5 @@
 #!/bin/sh
 
-if [ $# -lt 1 ]; then
-	echo "Usage: switch_theme <mode>"
-	echo "mode: dark|light"
-	exit 1
-fi
-
-mode=$1
-
 capitalize() {
 	printf '%s' "$1" | head -c 1 | tr "[:lower:]" "[:upper:]"
 	printf '%s' "$1" | tail -c '+2'
@@ -33,6 +25,14 @@ recolor_zathura() {
 	done <"$temp_file"
 }
 
+if [ $# -lt 1 ]; then
+	echo "Usage: switch_theme <mode>"
+	echo "mode: dark|light"
+	exit 1
+fi
+
+mode=$1
+
 if [ "$mode" = "light" ]; then
 	emacsclient --eval "(load-theme 'doom-nord-light 'no-confirm)"
 	change_theme dark light