Fix build break.

lib/growable_array.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 GrowableObjectArray<T> implements List<T> {
   factory GrowableObjectArray._uninstantiable() {
     throw const UnsupportedOperationException(
         "GrowableObjectArray can only be allocated by the VM");
   }
 
@@ skipping 61 matching lines @@
     Arrays.copy(this, start, list, 0, length);
     return list;
   }
 
   factory GrowableObjectArray() {
     var data = new ObjectArray<T>(4);
     return new GrowableObjectArray<T>.fromObjectArray(data);
   }
 
   factory GrowableObjectArray.withCapacity(int capacity) {
-    var data = new ObjectArray<T>(capacity);
+    var data = new ObjectArray<T>((capacity == 0)? 4 : capacity);
     return new GrowableObjectArray<T>.fromObjectArray(data);
   }
 
   factory GrowableObjectArray.from(Collection<T> other) {
     List<T> result = new GrowableObjectArray<T>();
     result.addAll(other);
     return result;
   }
 
   factory GrowableObjectArray.fromObjectArray(ObjectArray<T> data)
@@ skipping 144 matching lines @@
   T next() {
     if (!hasNext()) {
       throw const NoMoreElementsException();
     }
     return _array[_pos++];
   }
 
   final GrowableObjectArray<T> _array;
   int _pos;
 }