Removed redundant function call from encode_block_residual()
Removed redundant function call from encode_block_residual()

intra_set_block_mode() was called twice with the same parameters.

ultravideo/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,lu-zero/kvazaar,lu-zero/kvazaar,ultravideo/kvazaar,ultravideo/kvazaar