libvpx: Pull from upstream

source/libvpx/vp8/encoder/rdopt.c

Index: source/libvpx/vp8/encoder/rdopt.c
===================================================================
--- source/libvpx/vp8/encoder/rdopt.c	(revision 263011)
+++ source/libvpx/vp8/encoder/rdopt.c	(working copy)
@@ -528,19 +528,16 @@
 
     VP8_COMBINEENTROPYCONTEXTS(pt, *a, *l);
 
-# define QC( I)  ( qcoeff_ptr [vp8_default_zig_zag1d[I]] )
-
+    assert(eob <= 16);
     for (; c < eob; c++)
     {
-        int v = QC(c);
-        int t = vp8_dct_value_tokens_ptr[v].Token;
+        const int v = qcoeff_ptr[vp8_default_zig_zag1d[c]];
+        const int t = vp8_dct_value_tokens_ptr[v].Token;
         cost += mb->token_costs [type] [vp8_coef_bands[c]] [pt] [t];
         cost += vp8_dct_value_cost_ptr[v];
         pt = vp8_prev_token_class[t];
     }
 
-# undef QC
-
     if (c < 16)
         cost += mb->token_costs [type] [vp8_coef_bands[c]] [pt] [DCT_EOB_TOKEN];