Update os/os.module.go

Co-authored-by: Sebastien Binet <[email protected]>

Author: glaukiol1

os/os.module.go

@@ -223,7 +223,8 @@ func _exit(self py.Object, args py.Tuple) (py.Object, error) { // can never retu
 	if len(args) == 0 {
 		os.Exit(0)
 	}
-	if len(args) == 1 && objectIsInt(args[0]) {
+	arg, ok := args[0].(py.Int)
+	if !ok { ...  handle error ... }
 		_ec, err := py.GetInt(args[0])
 		if err != nil {
 			os.Exit(1)