From 67708d67013776fb0aa6593a49249a1b350fe602 Mon Sep 17 00:00:00 2001
From: Urvang Joshi <urvang@google.com>
Date: Fri, 5 Apr 2013 11:33:44 -0700
Subject: [PATCH] WebPEncode: An additional check. Start
 VP8EncLoop/VP8EncTokenLoop only if VP8EncStartAlpha succeeded.

Change-Id: Id1faca3e6def88102329ae2b4974bd4d6d4c4a7a
---
 src/enc/webpenc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/enc/webpenc.c b/src/enc/webpenc.c
index 20fbac4d..93d34dae 100644
--- a/src/enc/webpenc.c
+++ b/src/enc/webpenc.c
@@ -386,9 +386,9 @@ int WebPEncode(const WebPConfig* config, WebPPicture* pic) {
     // Analysis is done, proceed to actual coding.
     ok = ok && VP8EncStartAlpha(enc);   // possibly done in parallel
     if (!enc->use_tokens_) {
-      ok = VP8EncLoop(enc);
+      ok = ok && VP8EncLoop(enc);
     } else {
-      ok = VP8EncTokenLoop(enc);
+      ok = ok && VP8EncTokenLoop(enc);
     }
     ok = ok && VP8EncFinishAlpha(enc);
 #ifdef WEBP_EXPERIMENTAL_FEATURES