Throw and a small fix to If.

frog/tests/leg_only/src/Throw2NegativeTest.dart

Index: frog/tests/leg_only/src/Throw2NegativeTest.dart
diff --git a/frog/tests/leg_only/src/Throw2NegativeTest.dart b/frog/tests/leg_only/src/Throw2NegativeTest.dart
new file mode 100644
index 0000000000000000000000000000000000000000..7590b81f9c98da6c22d33699457396df219bbf39
--- /dev/null
+++ b/frog/tests/leg_only/src/Throw2NegativeTest.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() {
+  if (true) throw "foo";
+}