Methods that return Hashes (where C API returns multiple values) are different now

[turboladen]

I was looking up the docs for GDAL::RasterBand#offset, to see what the is_meaningful part of the return Hash really means, but the GDAL docs no longer have any mention of that. It looks like that value is now used to indicate if the call succeeded or not. ...so this should change to raise if the call wasn't successful.

...but I also wonder how many of the other Ruby methods that return Hashes like this are no longer accurate.