Respect samplesperpixel even if this is a CFA image.
Respect samplesperpixel even if this is a CFA image.

Fixes decoding of Fujifilm FinePix X10 DNG, but note that images are delivered with 2 samples per pixel, which will likely need adjustments to work in your application.

Fixes Issue #45.

anarsoul/rawspeed,LebedevRI/rawspeed,klauspost/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,anarsoul/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed,mgehre/rawspeed,anarsoul/rawspeed,klauspost/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,mgehre/rawspeed