fix query length from 1000 to ids.length

src/vs/platform/extensionManagement/node/extensionManagementUtil.ts

@@ -36,7 +36,11 @@ export function getOutdatedExtensions(extensionsService: IExtensionManagementSer
 	return extensionsService.getInstalled().then(installed => {
 		const ids = installed.map(getExtensionId);
 
-		return galleryService.query({ ids, pageSize: 1000 }).then(result => {
+		if (installed.length === 0) {
+			return TPromise.as([]);
+		}
+
+		return galleryService.query({ ids, pageSize: ids.length }).then(result => {
 			const available = result.firstPage;
 
 			return available.filter(extension => {