Merge pull request #2179 from Tyriar/release/3.14_2174

Fix NPE in open

package.json

@@ -1,7 +1,7 @@
 {
   "name": "xterm",
   "description": "Full xterm terminal, in your browser",
-  "version": "3.14.1",
+  "version": "3.14.2",
   "main": "lib/public/Terminal.js",
   "types": "typings/xterm.d.ts",
   "repository": "https://github.com/xtermjs/xterm.js",

src/Terminal.ts

@@ -750,7 +750,6 @@ export class Terminal extends EventEmitter implements ITerminal, IDisposable, II
     this.element.appendChild(fragment);
 
     this._theme = this.options.theme;
-    this.options.theme = null;
     this._colorManager = new ColorManager(document, this.options.allowTransparency);
     this._colorManager.setTheme(this._theme);