Fix preprocessor directives in cros.h

[blanquez]

Fixed preprocessor directive in cros.h to protect the header correctly

[blanquez]

@rrcarrillo I have opened this PR to fix the issue in cros.h. I have no permission to add a reviewer since I am not a collaborator.

[rrcarrillo]

Thank you for the fix. I think that this pull request should be approved, but I don't have write access to this project. Maybe @gavanderhoorn could approve the changes?

[gavanderhoorn]

I'm slightly out of the loop here.

None of the original maintainers of cROS appear to be active any more.

What are your affiliations @blanquez and @rrcarrillo?

[rrcarrillo]

Hi @gavanderhoorn, when I started contributing to cROS my affiliation was "Institut de la Vision, Sorbonne University, Paris". Now my affiliation is "Department of Computer Architecture and Technology, University of Granada, Granada"

[gavanderhoorn]

Thanks.

So what is the status of it-robotics? The accounts from the two previous maintainers don't appear to have been active for at least a year if not longer.

Would you @rrcarrillo be the de facto maintainer of cROS now?

[rrcarrillo]

I don't know what the status of it-robotics is, I have no relationship with them.
If no one else wants to be in charge, I can be the de facto maintainer of cROS. I don't have much time to spend on the project, but someone should approve the pull requests.