[f2py] callback - integer conversion

[Mike Müller]

>You'll need to specify that ae_func is a function returning integer, not
>real as follows from default implicit rules. So, try
>
>subroutine pcg_wrapper(ae_func)
>    external ae_func
>    integer ae_func
>    integer:: ok = 0
>
>    write(*,*) 'ok', ok
>    ok = ae_func()
>    write(*,*) 'ok', ok
>
>end


This works.

Thanks a lot.

Mike