Created Issue: JavaScriptView works slightly difference [6462]

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I have a partial view. The view has a binding ${Product.Barcode} and the barcode is set to null. If the view is generated on the server side it works well. The result of the binding is empty string. But when I use generated JavaScript view code to build html tree it doesn't work, because the JavaScript code contains following line:

this.Write = function(arg) {this._parts.push(arg.toString());};

It seems the Writer is invoked with arg = ${Product.Barcode} (null) and null reference exception is thrown.
I would expect the both compiled views (C# and JavaScript) should accept the same parameters and produce the same results.

URL: http://sparkviewengine.codeplex.com/workitem/6462

[TMFReason]

Although you should expect the same result, the best practice may be
to use $!{Product.Barcode} since it may be null. Hopefully that will
fixed the Javascript result, but I can't say for sure.

From http://www.sparkviewengine.com/documentation/expressions :
"The syntax $!{expression} can also be used if you want to ensure any
null values and NullReferenceException that result from the expression
will produce no output at all."