Temporary chan in send fails to typecheck

[jyasskin]

io fn main() {
  let port[int] p = port();
  chan(p) <| 3;
}

fails with

test2.rs:3:6 - 3:14:E:Error: unresolved temp node #0

pulling the chan out into a local variable compiles successfully.

[pcwalton]

This is a bug in resolve.ml actually, not the typechecker.

[pcwalton]

Include the statements on the LHS of a binop when desugaring. Closed by 0863114.