rem: freefa(f) struct fa *f;
add: freefa(fa *f)
context: freefa(f)	struct fa *f;{	register int i;	if (f == NULL)		return;	for (i=0; i<=f->curstat; i++)		xfree(f->posns[i]);	for (i=0; i<=f->accept; i++)		xfree(f->re[i].lfollow);	xfree(f->restr);	xfree(f);}