Try fix bug his._extensionData.m undefined in peer.js line 183

[cleberpereiradasilva]

Fix bug in perr.js file, when this._extensionData.m is undefined an exception occurs in line 183.

[superafroman]

Hey, thanks for the PR! This project isn't really getting any love so nice to have contributions :).

This change could fail if this._extensionData is undefined - something more like this._extensionData && this._extensionData.m && this._extensionData.m[type] might work. Though if m can be undefined it will also be an issue in Peer.prototype.supportsExtension. It could be worth add a new function Peer.prototype.getExtension which returns they extension value for a key and encapsulates the undefined checking.

[cleberpereiradasilva]

Oh, ok, Im new in contributions. Im learning and liked for this repo. I love .torrents!

[cleberpereiradasilva]

What do when this._extensionData.m is undefined?

[superafroman]

Just set code to undefined. It'd be best to break this out so it's more readable. So the code could be -

var code = null;
if (Message.EXTENDED_HANDSHAKE === type) {
  code = 0;
} else if (this._extensionData && this._extensionData.m) {
  code = this._extensionData.m[type];
}