Add missing prototypes in libgfortran

[Tobias Schlüter]

Andreas Jaeger wrote:
> Ok, I've added proper #ifdefs around the new prototypes, tested this
> time with both 32-bit and 64-bit compilation on Linux/x86-64,
> 
> Andreas
> 
> 2005-11-10  Andreas Jaeger  <aj@suse.de>
> 
> 	* libgfortran.h: Add proper defines where needed.

Ok.

- Tobi