improve detect_mode() logic

Full/nanodroid-functions

@@ -135,7 +135,16 @@ error () {
 
 detect_mode () {
 	case "${nanodroid_forcesystem}" in
-		0 )
+		1 )
+			if ! ${BOOTMODE}; then
+				MODE=SYSTEM
+				MODE_TEXT=" > Mode   | System            | forced"
+			else
+				error " !! Forced System Mode installation requested, but device in BOOTMODE"
+			fi
+		;;
+
+		0 | *)
 			if [ -f /data/adb/magisk/magisk ]; then
 				MODE=MAGISK
 				MODE_TEXT=" > Mode   | Magisk            | detected"
@@ -146,15 +155,6 @@ detect_mode () {
 				error " !! Magisk 15.0+ not found and device in BOOTMODE"
 			fi
 		;;
-
-		1 )
-			if ! ${BOOTMODE}; then
-				MODE=SYSTEM
-				MODE_TEXT=" > Mode   | System            | forced"
-			else
-				error " !! Forced System Mode installation requested, but device in BOOTMODE"
-			fi
-		;;
 	esac
 
 	ui_print "${MODE_TEXT}"