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4f7aeffd8c
The x86 optimized dct_quantize only calculates the last nonzero coefficient correctly if the zigzag scan order is used. For the alternate scan order, this value is incorrect. To work around this, the dct_unquantize functions process the entire block if the alternate scan order is used. But a second workaround (bb198e198ab) was added that recalculates the last nonzero coefficient after dct_quantize is called if the alternate scan order is used. This commit removes the first workaround, which became redundant.