Add CPLErrContainer wrapper for ContourGenerate

[emar-kar]

Recent update with new func ContourGenerate resulted in build errors on new versions of go.

github.com/lukeroth/gdal/algorithms.go:325:3: CPLErr(func() _Ctype_CPLErr {…}()).Err undefined (type CPLErr has no field or method Err)

This problem is related to #90 and was fixed in #92. Nevertheless ContourGenerate was using old format which caused some troubles.

[ARolek]

I just hit this same problem and this PR fixed it for me.

[canghel3]

this does fix the compile errors. would be nice if it was merged.

[chris]

Running into this as well. Using Go 1.22.3 on arm64 macOS.

[emar-kar]

@martende can you take a look, please?

[pdxrlj]

this does fix the compile errors. would be nice if it was merged.

[canghel3]

Any updates on this?

[Chenzo1001]

Still not merged yet....I've just modified local file by myself....

[canghel3]

Still not merged yet....I've just modified local file by myself....

I'd suggest using another library that is somewhat better maintained : https://github.com/airbusgeo/godal
This repo is dead.

[AliFlux]

Hi, this package is completely broken. And this PR could fix it, any idea why this isnt merged yet?

[xiaxichen]

hi this pr is good please check it