always convert args to strings

fixes #7498

src/vs/code/electron-main/env.ts

@@ -241,11 +241,7 @@ export class EnvService implements IEnvironmentService {
 
 function parsePathArguments(cwd: string, args: string[], gotoLineMode?: boolean): string[] {
 	const result = args.map(arg => {
-		if (typeof arg !== 'string') {
-			return null; // TODO@Ben workaround for https://github.com/Microsoft/vscode/issues/7498
-		}
-
-		let pathCandidate = arg;
+		let pathCandidate = String(arg);
 
 		let parsedPath: IParsedPath;
 		if (gotoLineMode) {