DngOpcodes::DngOpcodes(): sanitize opcode count
DngOpcodes::DngOpcodes(): sanitize opcode count

Not nice. We either have to do this,
or we will have to re-allocate the vector...

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