[wplug] C Language Question

[Diana A. Clarion]

I've been looking at some code that involves signal handlers, and have
encountered a construct I simply don't recognize.

The context:  A handler for SIGINT

void intr(int ignore)
{
	(void)ignore;
	siglongjmp(toplevel, 1);
}

The construct in question is "(void)ignore;".  I just don't seem to be able to
find a reference to it anywhere.  Is it a cast to some sort of 'void variable',
to ensure that the variable 'ignore' is unusable, or is it something else?

Many much thanks in advance,
DAC

-- 
Diana A. Clarion, Goddess of the Network
http://www.fnordnet.net/~dclarion