Also, align the mangled RGB planes, which is required for the
SIMD versions of dsputils' median predict.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This is essential for fast SIMD accesses.
The same should be done with the predict output.
Reviewed-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>