parens on sizeof

[Ron Natalie <ron>]

> > The empty string is an expression.
> 
> I bet Ritchie would be surprised to learn that.

Yeah, then it's obviously a bug that my compiler won't let me
do
	a = (int);

According to the K&R:

	Statement = ;
		    expr ;
		... list of things like while, if etc...

	Expression =   primary
		       unary expression
		...list of things, non of which are null...

	unary-expression:
		... all the others...
		(type-name) expression
		sizeof expression
		sizeof (type-name)

-Ron