ENH clean out the C layer warnings

[beckermr]

Right now we have a lot of C layer warnings which are

• not descriptive
• not correct
• override other warnings so that the error is not clear at the python layer
• inconsistent usage of ccl_cosmology_set_status_message

We need to clean this up and make sure everything is correct.

One thing that might be good to do is to use various C macros to denote the file and line number. This will ease the burden of listing the function name in the string. Also, C99 has a standard function name macro that we can use as well.

[c-d-leonard]

@beckermr is this resolved by the above merged PR?

[beckermr]

Nope. This is still a big issue in the library. The above PR is where we made this issue.

[c-d-leonard]

Ah okay thanks, sorry.