From f264e957a436f633051efb1e2721bab5342b276e Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Sun, 21 Dec 2008 05:06:05 -0500
Subject: [PATCH] Fixed NULL pointer dereference.

---
 mojoshader_assembler.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/mojoshader_assembler.c b/mojoshader_assembler.c
index 6429315b..18fa0699 100644
--- a/mojoshader_assembler.c
+++ b/mojoshader_assembler.c
@@ -1712,8 +1712,11 @@ static uint32 add_ctab_bytes(Context *ctx, const uint8 *bytes, const size_t len)
         void *ptr = Malloc(ctx, ctx->ctab_allocation);
         if (ptr == NULL)
             return 0;
-        memcpy(ptr, ctx->ctab, ctx->ctab_len);
-        Free(ctx, ctx->ctab);
+        if (ctx->ctab != NULL)
+        {
+            memcpy(ptr, ctx->ctab, ctx->ctab_len);
+            Free(ctx, ctx->ctab);
+        } // if
         ctx->ctab = (uint8 *) ptr;
     } // if