>	short convert2 __P((float));
>	short convert2(f)
>		float f;
>	{
>		return f;
>	}

The code is simply wrong.  If you are not using ANSI prototype style 
functions then the formal args of the function and the prototype should
be the K&R promoted types. 

Sorry if that was the point you were trying to make.

--sjg