Fix some type warnings.

lib/compiler/implementation/resolver.dart

Index: lib/compiler/implementation/resolver.dart
diff --git a/lib/compiler/implementation/resolver.dart b/lib/compiler/implementation/resolver.dart
index b169bec2a9c83dda9449d0ca5dba4e8385e75278..f137c9d43486755a575bd0b0e5592f95582296dd 100644
--- a/lib/compiler/implementation/resolver.dart
+++ b/lib/compiler/implementation/resolver.dart
@@ -1952,13 +1952,14 @@ class ClassResolverVisitor extends TypeDefinitionVisitor {
     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);