fixes as expected code

Author: FMorschel

packages/url_launcher/url_launcher/lib/src/legacy_api.dart

@@ -78,7 +78,7 @@ Future<bool> launch(
   final bool isWebURL =
       url != null && (url.scheme == 'http' || url.scheme == 'https');
 
-  if ((forceSafariVC ?? forceWebView) && !isWebURL) {
+  if (((forceSafariVC ?? false) || forceWebView) && !isWebURL) {
     throw PlatformException(
         code: 'NOT_A_WEB_SCHEME',
         message: 'To use webview or safariVC, you need to pass '