Fix some type warnings.

lib/compiler/implementation/resolver.dart

 // Copyright (c) 2012, 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.
 
 interface TreeElements {
   Element operator[](Node node);
   Selector getSelector(Send send);
   Type getType(TypeAnnotation annotation);
 }
 
@@ skipping 1934 matching lines @@
     return e.computeType(compiler);
   }
 
   void calculateAllSupertypes(ClassElement cls) {
     // TODO(karlklose): substitute type variables.
     // TODO(karlklose): check if type arguments match, if a classelement occurs
     //                  more than once in the supertypes.
     if (cls.allSupertypes !== null) return;
     final Type supertype = cls.supertype;
     if (supertype != null) {
-      Link<Type> superSupertypes = supertype.element.allSupertypes;
+      ClassElement superelement = supertype.element;

[ahe, 2012/08/20 15:23:16]

superelement -> superElement.

+      Link<Type> superSupertypes = superelement.allSupertypes;
       assert(superSupertypes !== null);
       Link<Type> supertypes = new Link<Type>(supertype, superSupertypes);
       for (Link<Type> interfaces = cls.interfaces;
            !interfaces.isEmpty();
            interfaces = interfaces.tail) {
-        Element element = interfaces.head.element;
+        ClassElement element = interfaces.head.element;
         Link<Type> interfaceSupertypes = element.allSupertypes;
         assert(interfaceSupertypes !== null);
         supertypes = supertypes.reversePrependAll(interfaceSupertypes);
         supertypes = supertypes.prepend(interfaces.head);
       }
       cls.allSupertypes = supertypes;
     } else {
       assert(cls === compiler.objectClass);
       cls.allSupertypes = const EmptyLink<Type>();
     }
@@ skipping 500 matching lines @@
   TopScope(LibraryElement library) : super(null, library);
   Element lookup(SourceString name) {
     return library.find(name);
   }
 
   Element add(Element newElement) {
     throw "Cannot add an element in the top scope";
   }
   String toString() => '$element';
 }