Add missing parameter to function call in latin1.dart.

sdk/lib/convert/latin1.dart

 // Copyright (c) 2013, 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.
 
 part of dart.convert;
 
 /**
  * An instance of the default implementation of the [Latin1Codec].
  *
  * This instance provides a convenient access to the most common ISO Latin 1
@@ skipping 231 matching lines @@
   void addSlice(List<int> source, int start, int end, bool isLast) {
     if (start < 0 || start > source.length) {
       throw new RangeError.range(start, 0, source.length);
     }
     if (end < start || end > source.length) {
       throw new RangeError.range(end, start, source.length);
     }
     for (int i = start; i < end; i++) {
       if ((source[i] & ~0xFF) != 0) {
         if (_allowInvalid) {
-          if (i > start) _addSliceToSink(source, start, i);
+          if (i > start) _addSliceToSink(source, start, i, false);
           // Add UTF-8 encoding of U+FFFD.
           _addSliceToSink(const[0xFFFD], 0, 1, false);
           start = i + 1;
         } else {
           throw new FormatException("Source contains non-Latin-1 characters.");
         }
       }
     }
     if (start < end) {
       _addSliceToSink(source, start, end, isLast);
     } else if (isLast) {
       close();
     }
   }
 }