lint enhancement for 4.?bsd (and others?)

[Arthur David Olson]

Had a program today that looked (in part) like this:

	control(counter)
	int	counter;
	{
		if (control > 0)
			--counter;
	}

I was surprised that lint failed to pick up the typo.  So for all you folks
with "lint.c" source:

> ed lint.c
> /case LE:/a
> #ifndef OLDVERSION
>		if (p->in.left->in.op == ICON && p->in.right->in.op == ICON)
>			werror("comparison of constants");
>		else if (p->in.op != EQ && p->in.op != NE)
>			if (ISPTR(p->in.left->in.type) &&
>			    ISFTN(DECREF(p->in.left->in.type)) ||
>			    ISPTR(p->in.right->in.type) &&
>			    ISFTN(DECREF(p->in.right->in.type))	)
>				werror("function address in comparison");
> #endif
.
w
q
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