Fix type annotation in the typechecker.

lib/compiler/implementation/typechecker.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.
 
 class TypeCheckerTask extends CompilerTask {
   TypeCheckerTask(Compiler compiler) : super(compiler);
   String get name() => "Type checker";
 
   static final bool LOG_FAILURES = false;
 
@@ skipping 446 matching lines @@
       }
     }
     if (member !== null && member.kind == ElementKind.FUNCTION) {
       return computeType(member);
     }
     reportTypeWarning(node, MessageKind.METHOD_NOT_FOUND,
                       [classElement.name, name]);
     return types.dynamicType;
   }
 
-  void analyzeArguments(Send send, FunctionType funType) {
+  void analyzeArguments(Send send, Type type) {
     Link<Node> arguments = send.arguments;
-    if (funType === null || funType === types.dynamicType) {
+    if (type === null || type === types.dynamicType) {
       while(!arguments.isEmpty()) {
         analyze(arguments.head);
         arguments = arguments.tail;
       }
     } else {
+      FunctionType funType = type;
       Link<Type> parameterTypes = funType.parameterTypes;
       while (!arguments.isEmpty() && !parameterTypes.isEmpty()) {
         checkAssignable(arguments.head, parameterTypes.head,
                         analyze(arguments.head));
         arguments = arguments.tail;
         parameterTypes = parameterTypes.tail;
       }
       if (!arguments.isEmpty()) {
         reportTypeWarning(arguments.head, MessageKind.ADDITIONAL_ARGUMENT);
       } else if (!parameterTypes.isEmpty()) {
@@ skipping 357 matching lines @@
   }
 
   visitCatchBlock(CatchBlock node) {
     return unhandledStatement();
   }
 
   visitTypedef(Typedef node) {
     return unhandledStatement();
   }
 }