From c5a5b0286f266c7d6d097258a835a4756ea50c98 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Mon, 27 Jan 2014 20:33:05 -0800
Subject: [PATCH] decode mt+incremental: fix segfault in debug builds

VP8GetThreadMethod() may be called with a NULL headers param; correct an
assert.

broken since:
8a2fa09 Add a second multi-thread method

Change-Id: If7b6d1b8f4ec874d343a806cee5f5e6bb6438620
---
 src/dec/frame.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dec/frame.c b/src/dec/frame.c
index e1eea94e..cf541cc8 100644
--- a/src/dec/frame.c
+++ b/src/dec/frame.c
@@ -502,7 +502,7 @@ int VP8GetThreadMethod(const WebPDecoderOptions* const options,
   (void)headers;
   (void)width;
   (void)height;
-  assert(!headers->is_lossless);
+  assert(headers == NULL || !headers->is_lossless);
 #if defined(WEBP_USE_THREAD)
   if (width < MIN_WIDTH_FOR_THREADS) return 0;
   // TODO(skal): tune the heuristic further