Missed some zero parameter check

examples/acceptance_tests/047/aiken.lock

@@ -1,7 +0,0 @@
-# This file was generated by Aiken
-# You typically do not need to edit this file
-
-requirements = []
-packages = []
-
-[etags]

examples/acceptance_tests/047/plutus.json

@@ -1,48 +0,0 @@
-{
-  "preamble": {
-    "title": "aiken-lang/acceptance_test_047",
-    "version": "0.0.0",
-    "plutusVersion": "v2",
-    "compiler": {
-      "name": "Aiken",
-      "version": "v1.0.31-alpha+745f14c"
-    }
-  },
-  "validators": [
-    {
-      "title": "foo.foo.spend",
-      "datum": {
-        "title": "_datum",
-        "schema": {
-          "$ref": "#/definitions/Void"
-        }
-      },
-      "redeemer": {
-        "title": "_redeemer",
-        "schema": {
-          "$ref": "#/definitions/Void"
-        }
-      },
-      "compiledCode": "587601000032323232323225333002323232323253330073370e900118041baa0011323232324a2a66601466e1d2000300b375400a2a66601a60186ea80145261616300d300e002300c001300937540022c6014601600460120026012004600e00260086ea8004526136565734aae7555cf2ab9f5742ae89",
-      "hash": "c613c8326fea00dff179b7108f248b60c155881bbce544d84fe573e1"
-    },
-    {
-      "title": "foo.foo.else",
-      "compiledCode": "587601000032323232323225333002323232323253330073370e900118041baa0011323232324a2a66601466e1d2000300b375400a2a66601a60186ea80145261616300d300e002300c001300937540022c6014601600460120026012004600e00260086ea8004526136565734aae7555cf2ab9f5742ae89",
-      "hash": "c613c8326fea00dff179b7108f248b60c155881bbce544d84fe573e1"
-    }
-  ],
-  "definitions": {
-    "Void": {
-      "title": "Unit",
-      "description": "The nullary constructor.",
-      "anyOf": [
-        {
-          "dataType": "constructor",
-          "index": 0,
-          "fields": []
-        }
-      ]
-    }
-  }
-}