DngOpcodes: better handling of sanitization of ROIOpcode.
DngOpcodes: better handling of sanitization of ROIOpcode.

Some opcodes (e.g. FixBadPixelsList) do require for the ROI
to be fully inclusive (<w/h), other **seem** to be ok with <=w/h.

At least this should *not* regress the FixBadPixelsList
(which was already observed to require {0,0,x-1,y-})
while not changing the others.

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