[gdal] fixed compilation issue with std::fabs

[jepessen]

I had a compilation issue in ogr/ogrlinestring.cpp because std::fabs was not defined. I've added include file.

I'm using Windows 10 Professional, and build with Visual Studio 2017 and 2019

[msftclas]

All CLA requirements met.

[jumpinjackie]

You should probably upstream this fix to https://github.com/OSGeo/gdal as well

[jepessen]

I've created a pull request also in gdal repository.

[NancyLi1013]

Hi @jepessen, thanks for your PR. Could you also bump the CONTROL version?

[jepessen]

It should be ok. Where can I find some guideline about bumping version numbers? I didn't find anything about it...

[jumpinjackie]

@jepessen You bump the number after the - to signal changes to the port. Pretty much any PR for ports that does not update to a new release version would require bumping the port version number.

Source: My observations from submitted PRs :)

[jepessen]

Ok thanks for the info. I'll take care of it in future merges.

[Rastaban]

@jepessen incrementing the control verson helps with the vcpkg upgrade command. The policy is buried with the documentation for the CONTROL file in control-files.md and is admitadly very easy to miss.