Use C interface to get constraint dimension

[FreyJo]

No description provided.

[adrian-kriegel]

Thanks for the PR. I can't find any doc on ocp_nlp_dims_get_from_attr but I know that you know what you are doing :-)

[adrian-kriegel]

Sorry, the change does not compile (missing semicolon). But even with the semicolon, the tests don't pass.

error: ocp_nlp_dims_get_from_attr: field nbx not available

[FreyJo]

Hi,
Sorry for the missing semicolon and not testing it.
I just wanted to point out that the code in place is not the C interface of acados but rather part of the core.
The function does expect the name of a numerical array to be set, like lbx.
We could add the names of dimensions in that function as well.