Add a offset bounds check to DcrDecoder
Add a offset bounds check to DcrDecoder

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