From 5c77351ab7716762b1f2aa4ea8d739109c27e593 Mon Sep 17 00:00:00 2001
From: otya128 <otya128@users.noreply.github.com>
Date: Mon, 10 Jul 2017 21:35:32 +0900
Subject: [PATCH] Fix SPCHK argument check

---
 SMILEBASIC/builtinfunctions.d | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/SMILEBASIC/builtinfunctions.d b/SMILEBASIC/builtinfunctions.d
index ffef798..9650d30 100644
--- a/SMILEBASIC/builtinfunctions.d
+++ b/SMILEBASIC/builtinfunctions.d
@@ -2208,6 +2208,10 @@ class BuiltinFunction
         {
             throw new OutOfRange(smilebasicFunctionName, 1);
         }
+        if (!p.sprite.isSpriteDefined(id))
+        {
+            throw new IllegalFunctionCall("SPCHK", 1);
+        }
         return p.sprite.spchk(id);
     }
     static void SPPAGE(PetitComputer p, int page)