From cc5075e845368538e239a64a34a68c702fbf529d Mon Sep 17 00:00:00 2001
From: Mike Pall <mike>
Date: Tue, 8 Apr 2014 16:53:41 +0200
Subject: [PATCH] FFI: Fix cdata equality comparison against other Lua types.

---
 src/lj_carith.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/lj_carith.c b/src/lj_carith.c
index 36d7abb1..9a451b24 100644
--- a/src/lj_carith.c
+++ b/src/lj_carith.c
@@ -79,7 +79,7 @@ static int carith_checkarg(lua_State *L, CTState *cts, CDArith *ca)
       }
     } else {
       ca->ct[i] = NULL;
-      ca->p[i] = NULL;
+      ca->p[i] = (void *)(intptr_t)1;  /* To make it unequal. */
       ok = 0;
     }
   }