Throw and a small fix to If.

frog/tests/leg_only/src/Throw1NegativeTest.dart

Index: frog/tests/leg_only/src/Throw1NegativeTest.dart
diff --git a/frog/tests/leg_only/src/Throw1NegativeTest.dart b/frog/tests/leg_only/src/Throw1NegativeTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..19dcb800f1c7b8c9f702839913628b4c90d19020
--- /dev/null
+++ b/frog/tests/leg_only/src/Throw1NegativeTest.dart
@@ -0,0 +1,7 @@
+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+void main() {
+  throw "foo";
+}