small simplification of DNG code
small simplification of DNG code

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