Update wp7_parser.js

Fails to add windows package, files with 0 size are not directories.
[phonegap] adding the Windows Phone 8 platform...
Fatal error:
npm\node_modules\phonegap\node_modules\cordova\src\metadata\wp8_parser.
js:220
            if(stat.size == 0 {
                              ^
SyntaxError: Unexpected token {
    at Module._compile (module.js:439:25)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at Object.defineProperty.get [as parser] (c:\Users\AppData\Roaming\npm\node_modules\phonegap
\node_modules\cordova\src\util.js:140:55)
    at Function.module.exports.supports (c:\Users\AppData\Roaming\npm\node_modules\phonegap\node
_modules\cordova\src\platform.js:259:41)
    at call_into_create (c:\Users\AppData\Roaming\npm\node_modules\phonegap\node_modules\cordova
\src\platform.js:295:24)
    at c:\Users\AppData\Roaming\npm\node_modules\phonegap\node_modules\cordova\src\platform.js:9
6:29
    at c:\Users\AppData\Roaming\npm\node_modules\phonegap\node_modules\cordova\src\lazy_load.js:
48:31