void avoidance

[Richard O'Keefe]

	As far as I know, the point of writing 
#define	Ignore (void)
	Ignore sprintf(....);

is to stop lint squawking about a function returning a value which
is sometimes ignored.  

	By the way, I've run into a problem with 'void'.  The 
Berkeley compiler seems to get confused with compound types based
on void.  
	typedef void (*fnptr)();
doesn't always work properly, mainly in initialisations.