From: Frank Galligan <fgalligan@google.com>
Date: Thu, 5 Dec 2013 06:21:00 +0000 (-0800)
Subject: Fix ref count decrement code.
X-Git-Tag: v1.4.0~2900
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7ecf3bc91c1773902bd645655213d1c592251707;p=libvpx

Fix ref count decrement code.

Buffer 0 would never be decremented, so it could only be used
once.

Change-Id: I605d99fa2a513eadae6a0e230161729880653282
---

diff --git a/vp9/common/vp9_onyxc_int.h b/vp9/common/vp9_onyxc_int.h
index 6d14128a8..2c410669a 100644
--- a/vp9/common/vp9_onyxc_int.h
+++ b/vp9/common/vp9_onyxc_int.h
@@ -240,7 +240,7 @@ static int get_free_fb(VP9_COMMON *cm) {
 static void ref_cnt_fb(int *buf, int *idx, int new_idx) {
   const int ref_index = *idx;
 
-  if (ref_index > 0 && buf[ref_index] > 0)
+  if (ref_index >= 0 && buf[ref_index] > 0)
     buf[ref_index]--;
 
   *idx = new_idx;