Using pd->dqcoeff instead of pd->qcoeff in the decoder.
It is more logical to use dqcoeff buffer to put there *dequantized* transform coefficients (inside inverse_transform_block and decode_coefs functions). Dequantization happens inside WRITE_COEF_CONTINUE macro. qcoeff buffer should be only used in the encoder for *quantized* transform coefficients. Change-Id: Ifd54bef272bbf5311ced6669c4f1079f998af5d7