domain: remove deprecated API call · nodejs/node@95b8b7e

Original file line number	Diff line number	Diff line change
`@@ -270,7 +270,7 @@ Domain.prototype._errorHandler = function(er) {`
`270`	`270`	`// as this would throw an error, make the process exit, and thus`
`271`	`271`	`// prevent the process 'uncaughtException' event from being emitted`
`272`	`272`	`// if a listener is set.`
`273`		`-if (EventEmitter.listenerCount(this, 'error') > 0) {`
	`273`	`+if (this.listenerCount('error') > 0) {`
`274`	`274`	`// Clear the uncaughtExceptionCaptureCallback so that we know that, since`
`275`	`275`	`// the top-level domain is not active anymore, it would be ok to abort on`
`276`	`276`	`// an uncaught exception at this point`