Fixes Crypto Reference Error

[tayler-king]

The initial variables crypto, request, querystring, url, and xrds are never initiated. This can cause a ReferenceError: crypto is not defined, as seen:

ReferenceError: crypto is not defined
at Object.<anonymous> (C:\Node\xxxxx\node_modules\openid\openid.js:30:12)
at Module._compile (module.js:541:32)
at Object.Module._extensions..js (module.js:550:10)
at Module.load (module.js:456:32)
at tryModuleLoad (module.js:415:12)
at Function.Module._load (module.js:407:3)
at Module.require (module.js:466:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (C:\Node\xxxxx\node_modules\passport-openid-node6support\lib\passport-openid\ind
at Module._compile (module.js:541:32)

I have changed line 29 from var Buffer = require('buffer').Buffer; to var Buffer = require('buffer').Buffer, - this allows the variables following it to be initiated using var from the buffer initialization.

[tayler-king]

Cheers.

[havard]

Thanks!