From 89cd1bb85be60f205c917bee8ae578334258f3d3 Mon Sep 17 00:00:00 2001
From: James Zern <jzern@google.com>
Date: Tue, 31 Jan 2012 15:26:35 -0800
Subject: [PATCH] idec: fix WebPIUpdate failure

If the first call to WebPIUpdate contained all of partition 0, but not
enough to decode a macroblock the test for max macro block size could
fail (4096 bytes) due to a memory buffer offset not being updated.
This change offsets the buffer in the same manner as Append().

Fixes issue #105.

Change-Id: I90ca3d0dde92eedc076933b8349d2d297f2469e8
---
 src/dec/idec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dec/idec.c b/src/dec/idec.c
index fdce8839..8765ba04 100644
--- a/src/dec/idec.c
+++ b/src/dec/idec.c
@@ -310,12 +310,12 @@ static int CopyParts0Data(WebPIDecoder* idec) {
     }
     memcpy(part0_buf, br->buf_, psize);
     mem->part0_buf_ = part0_buf;
-    mem->start_ += psize;
     br->buf_ = part0_buf;
     br->buf_end_ = part0_buf + psize;
   } else {
     // Else: just keep pointers to the partition #0's data in dec_->br_.
   }
+  mem->start_ += psize;
   return 1;
 }