RawImageDataU16::scaleValues_plain(): port to Array2DRef
RawImageDataU16::scaleValues_plain(): port to Array2DRef

LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed