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vp8/encoder/mcomp.c: remove an unused variable

Change-Id: I980da3c70f7cee1b723ede0ed2ae527ac7cd6a51

--- a/vp8/encoder/mcomp.c

+++ b/vp8/encoder/mcomp.c

@@ -235,13 +235,12 @@

     MACROBLOCKD *xd = &x->e_mbd;

     unsigned char *y0 = base_pre + d->offset + (bestmv->as_mv.row) * pre_stride + bestmv->as_mv.col;

     unsigned char *y;

-    int buf_r1, buf_r2, buf_c1, buf_c2;

+    int buf_r1, buf_r2, buf_c1;

     /* Clamping to avoid out-of-range data access */

     buf_r1 = ((bestmv->as_mv.row - 3) < x->mv_row_min)?(bestmv->as_mv.row - x->mv_row_min):3;

     buf_r2 = ((bestmv->as_mv.row + 3) > x->mv_row_max)?(x->mv_row_max - bestmv->as_mv.row):3;

     buf_c1 = ((bestmv->as_mv.col - 3) < x->mv_col_min)?(bestmv->as_mv.col - x->mv_col_min):3;

-    buf_c2 = ((bestmv->as_mv.col + 3) > x->mv_col_max)?(x->mv_col_max - bestmv->as_mv.col):3;

     y_stride = 32;

     /* Copy to intermediate buffer before searching. */