"less than or equals" errors on int-s

[vmarkovtsev]

The following code

1 <= 2

fails with

ng: ng eval panic: binOp type mismatch Left: +1 (eval.UntypedInt), Right: +2 (eval.UntypedInt) op: <=

and this code

var a int = 1
var b int = 2

fails with

ng: ng eval panic: binOp type mismatch Left: 1 (int), Right: 2 (int) op: <=