Created Unassigned: Method calls on number literals don't work [19760]

Hi,

I'm using the latest AjaxMin.dll in a project to minify some JavaScript code on-the-fly. One of my pages also contains es5-shim.js which the JSParser parses incorrectly. That's how I came accross this issue.

It turns expressions like
```
(123).toFixed(0);
```
into
```
123.toFixed(0);
```

Which throws the following error in browsers:
```
SyntaxError: identifier starts immediately after numeric literal
```

Here is es5-shim:
https://github.com/kriskowal/es5-shim/blob/master/es5-shim.js