message: t9s: fix error message when port conflicts
diff: @@ -22,7 +22,7 @@ import detect from "detect-port";
  import * as app from "./app";
  export class TinyliciousRunner implements IRunner {
  - private server: IWebServer;
  + private server?: IWebServer;
  private runningDeferred: Deferred<void>;
  constructor(
  @@ -74,6 +74,7 @@ export class TinyliciousRunner implements IRunner {
  }
  public stop(): Promise<void> {
  + if (this.server) {
  // Close the underlying server and then resolve the runner once closed
  this.server.close().then(
  () => {
  @@ -83,6 +84,9 @@ export class TinyliciousRunner implements IRunner {
  this.runningDeferred.reject(error);
  },
  );
  + } else {
  + this.runningDeferred.resolve();
  + }
  return this.runningDeferred.promise;
  }
  