shithub: libvpx

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Fix ref count decrement code.

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

Change-Id: I605d99fa2a513eadae6a0e230161729880653282

--- a/vp9/common/vp9_onyxc_int.h

+++ b/vp9/common/vp9_onyxc_int.h

@@ -240,7 +240,7 @@

 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;