Fixing compile error

dbaeumer · dbaeumer · commit 105d2d824176 · 2018-01-09T11:48:18.000+01:00
diff --git a/extensions/gulp/src/main.ts b/extensions/gulp/src/main.ts
@@ -68,7 +68,7 @@ interface GulpTaskDefinition extends vscode.TaskDefinition {
 
 class FolderDetector {
 
-	private fileWatcher: vscode.FileSystemWatcher;
+	private fileWatcher: vscode.FileSystemWatcher | undefined;
 	private promise: Thenable<vscode.Task[]> | undefined;
 
 	constructor(private _workspaceFolder: vscode.WorkspaceFolder) {
