[PATCH,FORTRAN] Add libcaf prototype

[Tobias Burnus]

David Edelsohn wrote:
> libcaf produces warnings because it defines functions without
> prototypes.  This patch adds prototypes.
>
> Bootstrapped on powerpc-ibm-aix7.1.0.0.

OK - given that the removal of _gfortran_caf_critical takes longer than 
expected, it makes sense to add a prototype to silence the warning.

Tobias

>         * libcaf.h (_gfortran_caf_critical): Add a prototype.
>         (_gfortran_caf_end_critical): Same.
>
> Index: libcaf.h
> ===================================================================
> --- libcaf.h    (revision 198603)
> +++ libcaf.h    (working copy)
> @@ -76,7 +76,10 @@
>
>   /* FIXME: The CRITICAL functions should be removed;
>      the functionality is better represented using Coarray's lock feature.  */
> +void _gfortran_caf_critical (void);
>   void _gfortran_caf_critical (void)  { }
> +
> +void _gfortran_caf_end_critical (void);
>   void _gfortran_caf_end_critical (void)  { }
>